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Remote Code Execution (RCE) Resources

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A curated AppSec resource library covering XSS, SQLi, SSRF, IDOR, RCE, XXE, OSINT, and more.

Remote Code Execution (RCE)

Remote Code Execution (RCE) is the ability for an attacker to execute arbitrary commands or code on a target machine or process. RCE vulnerabilities represent the most critical class of security bugs — they give an attacker the same level of control as a system administrator.

RCE can manifest through many different attack vectors. Command injection occurs when user input is passed unsanitized to system shell commands. Deserialization attacks exploit unsafe object reconstruction in languages like Java, PHP, Python, and .NET. Server-Side Template Injection (SSTI) allows code execution through template engines like Jinja2, Twig, or Freemarker. File upload vulnerabilities can lead to RCE when executable files bypass upload filters and are served by the web server.

In modern applications, RCE often appears in less obvious places: expression language injection in Java frameworks, prototype pollution leading to code execution in Node.js, unsafe use of eval() or dynamic code loading, and vulnerabilities in PDF generators, image processors, and other libraries that shell out to system commands.

RCE bugs consistently command the highest payouts in bug bounty programs because the impact is total system compromise. Chaining lower-severity bugs into RCE — such as SSRF to cloud metadata to code execution — is a common and highly rewarded approach.

This page collects RCE techniques, exploitation writeups, and research across all major platforms and languages.

From Wikipedia

Start here: the RCE learning pathAn ordered route through this library — orientation, then methodology, then research. Read the RCE guideA long-form, source-cited deep dive synthesized from every resource below. The comprehensive RCE guide on chs.usA hand-written, in-depth practitioner guide — attacks, testing, and prevention.
Date Added Link Excerpt
2026-08-31 NEW 2026Microsoft Edge Multiple Vulnerabilities newsMicrosoft Edge has multiple vulnerabilities identified. The provided link leads to further details about these security weaknesses. The content does not specify any bug bounty payout amounts. → hkcert.org
2026-08-30 NEW 2026Indirect Calling of Nested Functions on GCC Without Executable Stack advancedThis research explores a vulnerability in GCC where indirect calls to nested functions can be achieved even when the stack is not executable. This bypasses common security measures. The vulnerability arises from how GCC handles nested function pointers and trampolines. The researchers demonstrate how to exploit this to execute arbitrary code, effectively gaining control of the system. The implications are significant for applications compiled with GCC that rely on non-executable stack protection.
2026-08-29 NEW 2026A critical Gitea flaw is under active attack and 8300 servers are still exposed news 4 min readLibrary for securing Gitea instances against CVE-2026-60004, a critical remote code execution flaw allowing attackers with repository write access to execute shell commands by abusing the diffpatch endpoint. Exploitation involves crafting a patch that triggers an add/add collision in Git's three-way fallback, enabling the execution of Git hooks. Versions 1.17 through 1.27.0 are vulnerable. The fix involves upgrading to Gitea 1.27.1 or later and disabling open registration.
2026-08-29 NEW 2026Five Critical WordPress Plugin and Theme Flaws Enable Site Takeover or RCE news 2 min readWriteup detailing critical WordPress plugin and theme vulnerabilities including CVE-2026-76581 (WPMU DEV Dashboard authentication bypass), CVE-2026-18431 (Avada theme arbitrary file write), CVE-2026-19632 (TranslatePress sensitive information exposure), CVE-2026-19598 (Pods privilege escalation), and CVE-2026-82222 (GiveWP remote code execution via PHP object injection). These flaws in plugins and themes like WPMU DEV Dashboard, Avada, TranslatePress, Pods, and GiveWP enable authentication bypass, account takeover, and arbitrary code execution. → thehackernews.com
2026-08-28 NEW 2026Attackers Chain Two PaperCut Flaws to Execute Code Without Authentication news 3 min readLibrary for detecting and remediating the chaining of CVE-2026-81578 (improper access control) and CVE-2026-82078 (unsafe dynamic class loading) in PaperCut NG and MF. Attackers exploit these vulnerabilities to bypass authentication and achieve arbitrary code execution, often using Base64-encoded commands for reconnaissance like "whoami & ver" and deploying Java .class files to fingerprint systems. Organizations are advised to patch immediately and restrict public exposure. → thehackernews.com
2026-08-28 NEW 2026In Other News: Log4j RCE Scare Minimus Shutdown Iranian Hacker Sanctions news 3 min readSurvey of recent cybersecurity incidents, detailing the Log4j RCE vulnerability's downplayed impact, LockBit's ransomware claims against U.S. Bank, Minimus's shutdown and acquisition by Echo, Truffle Security and Intruder's credential leak findings, Zimperium's research on mobile banking malware and AI usage, Troy Hunt's analysis of the Carhartt breach data's synthetic nature, Akira ransomware's attack on Paylogix, leaked Bauman University records on Russian cyber training, the Manchester Airports Group cyberattack, and US sanctions against Iranian hackers tied to MOIS. → securityweek.com
2026-08-28 NEW 2026Over 8300 Gitea servers vulnerable to code execution attacks news 2 min readWriteup of CVE-2026-60004, a critical code injection vulnerability affecting over 8,300 Gitea servers. Exploitation, requiring only repository write access which can be obtained via Gitea's default open registration, allows authenticated attackers to execute arbitrary shell commands. Salesforce researcher Shai Rod reported the flaw, and Gitea has released version 1.27.1 to address it. The vulnerability has been added to CISA's actively exploited flaws catalog, and U.S. agencies are mandated to patch. → bleepingcomputer.com
2026-08-28 NEW 2026Two Unitree G1 EDU Humanoid Robot Flaws Enable Root RCE One Starts Over Bluetooth news 2 min readWriteup detailing two root RCE vulnerabilities in the Unitree G1 EDU humanoid robot, CVE-2026-76639 and CVE-2026-76640. CVE-2026-76639 involves a path traversal through chat_go to bashrunner. CVE-2026-76640 exploits a BLE path that accepts bootstrap without pairing, followed by a buffer overflow during Wi-Fi provisioning, enabled by a flaw in Unitree's cloud account ownership verification. → thehackernews.com
2026-08-28 NEW 2026Hackers Actively Exploiting Pre-Auth RCE Flaw in PaperCut Print Software news 2 min readWriteup of actively exploited pre-auth RCE in PaperCut NG and MF, detailing how attackers gain arbitrary code execution by bypassing authorization checks. This vulnerability allows for remote server control, with observed exploitation involving commands for system enumeration and the deployment of malicious Java .class files to profile hosts and cover tracks. Huntress reproduced the exploit, achieving SYSTEM-level privileges. Affected organizations are urged to apply emergency patches, restrict public exposure of the PaperCut Application Server, and monitor for indicators of compromise.
2026-08-28 NEW 2026UniBLEed: Unauthenticated Root RCE on Any Unitree G1 Humanoid Robot Within Bluetooth Range news 69 min readWriteup detailing UniBLEed, a wormable exploit chain providing unauthenticated root RCE on Unitree G1 humanoid robots. This chain leverages a BLE characteristic write without pairing, heredoc injection for WiFi hijacking, a path traversal in the AI chatbot to leak load addresses, and a BSS buffer overflow to execute system commands as root. The writeup covers CVE-2026-76639 and CVE-2026-76640, stemming from discoveries including the hardcoded AES key, unauthenticated cloud API decryption, and insecure WiFi configuration.
2026-08-28 NEW 2026Inside 90 days of attacks on AI infrastructure news 7 min read AIAnalysis of active campaigns targeting AI infrastructure reveals exploitation of LiteLLM, MCP servers, and AI frameworks through remote code execution (RCE), blind prompt injection, and memory credential theft. Attackers leverage vulnerabilities like CVE-2026-59822 and CVE-2026-42271 in LiteLLM, and employ techniques such as DNS-based callbacks for blind prompt injection against agents utilizing tools like LangChain and Flowise. Post-exploitation efforts focus on extracting AI-specific credentials and configurations directly from memory and framework-specific file paths. → wiz.io
2026-08-27 NEW 2026Unknown PaperCut NG/MF vulnerability is under active attack news 2 min readVulnerability affecting PaperCut NG/MF print management software is under active attack, with attackers exploiting a remotely exploitable flaw in the Application Server. PaperCut Software advises restricting web access to trusted IP addresses and monitoring for indicators of compromise such as suspicious `pc-app.exe` activity or unusual entries in `server.log`, including "No suitable driver found for jdbc:no:x" or "DatabaseUtils – Database error looking up cardID". This follows previous attacks in 2023 leveraging CVE-2023-27350 and CVE-2023-27351. Emergency patches are now available for versions 25 and 25. → helpnetsecurity.com
2026-08-27 NEW 2026Next.js Patches Critical AVIF and Windows Flaws Enabling Unauthenticated RCE news 3 min readLibrary patches address critical vulnerabilities in Next.js, including CVE-2026-75604, a Windows path traversal flaw allowing unauthenticated RCE, and a heap buffer overflow in libheif (GHSA-2xp9-vwfh-vxw4) triggered by crafted AVIF images, which can also lead to RCE. Affected versions of Next.js are 13.4 through 15.5.23 and 16.0 through 16.3.2. The fixes are available in Next.js 15.5.24 and 16.3.3. → thehackernews.com
2026-08-27 NEW 2026CISA orders feds to patch Citrix NetScaler RCE flaw by Saturday news 2 min readOrder mandating federal agencies patch Citrix NetScaler RCE flaw, CVE-2026-8452, by August 29. The memory overflow vulnerability, impacting NetScaler ADC and Gateway appliances with Gateway VPN or AAA virtual servers, is actively exploited by attackers for remote code execution as root. This directive follows watchTowr's August disclosure of exploitation capabilities beyond denial-of-service, contrasting with earlier Citrix statements. CISA's inclusion on its Known Exploited Vulnerabilities Catalog highlights the urgency of patching against current threat actor activities. → bleepingcomputer.com
2026-08-27 NEW 2026Update Chrome before you browse again news 2 min readReference detailing Chrome's update to version 152.0.7977.64/.65, addressing 327 security fixes including critical vulnerabilities like CVE-2026-79282 in ANGLE allowing code execution outside the sandbox, and CVE-2026-78899, a use-after-free in the V8 engine with a CVSS of 8.8, which enables arbitrary code execution inside the sandbox via crafted HTML.
2026-08-27 NEW 2026CISA Adds Six Exploited Flaws to KEV Including NetScaler Linux and SQL Server Bugs news 2 min readCatalog of CISA KEV additions: CVE-2019-1068 (Microsoft SQL Server RCE), CVE-2026-8452 (Citrix NetScaler DoS), CVE-2022-0995 (Linux Kernel OOB write), CVE-2015-5287 (Red Hat ABRT privilege escalation), CVE-2015-3246 (Red Hat libuser race condition), and CVE-2021-23758 (AjaxPro deserialization RCE). Active exploitation of CVE-2026-8452 is noted, with attackers dropping web shells. Cisco Talos reported a Chinese cybercrime group targeting Windows and Linux servers with several of these flaws. Injection weaknesses and memory safety issues dominate KEV entries, emphasizing the need for secure coding practices. → thehackernews.com
2026-08-27 NEW 2026Chaining three public V8 bugs to escape the V8 sandbox and recover a real Google v8CTF flag advanced 17 min readLibrary for chaining three public V8 bugs (CVE-2026-15903, CVE-2026-15776, and a third unnamed bug) to achieve a V8 sandbox escape and retrieve a real Google v8CTF flag. The exploit leverages an address oracle from the first bug, write capabilities from the second bug by exploiting a Garbage Collection mistake and creating a fake JavaScript array, and pivots native stack execution outside the V8 cage with the third bug. This enabled the recovery of a flag located at `/flag/flag` within the v8CTF environment, targeting Chrome 150.0.7871.46 with V8 15.0.245.13.
2026-08-27 NEW 2026A GUID is Not a Credential: Unauthenticated RCE in Veeam Service Provider Console advanced 16 min read AuthZTool for identifying unauthenticated RCE in Veeam Service Provider Console. This tool helps detect vulnerabilities like CVE-2026-58073, which allows impersonation of managed agents, and CVE-2026-58072, enabling arbitrary file writes. These flaws, when chained, permit unauthenticated remote code execution on the console responsible for managing tenant backups. The tool aids defenders in sweeping their environments for exploitation indicators. → bishopfox.com
2026-08-27 NEW 2026Zimbra Multiple Vulnerabilities newsWriteup detailing multiple high-risk vulnerabilities in Zimbra servers, affecting versions prior to 10.1.20. Exploitable issues include cross-site scripting, sensitive information disclosure, security restriction bypass, and remote code execution. Mitigation requires applying the vendor-issued fix to version 10.1.20. → hkcert.org
2026-08-26 NEW 2026Critical Avada WordPress theme flaw enables zero-click RCE news 2 min readWriteup of CVE-2026-18431, a critical vulnerability chain affecting the Avada WordPress theme and Fusion Builder plugin, enabling unauthenticated, zero-click arbitrary PHP code execution. The exploit chains six security issues, including authorization, input-validation, trust-boundary, and file-handling weaknesses, requiring a specific execution order. This flaw, impacting Avada versions up to 7.16 and Fusion Builder up to 3.16, could lead to full website compromise. Researchers at Wordfence discovered the vulnerability using their Argus framework. → bleepingcomputer.com
2026-08-26 NEW 2026WARNING: Critical Microsoft SharePoint Exploit Chain Discovered newsA critical exploit chain targeting Microsoft SharePoint has been discovered. The vulnerability allows for remote code execution, posing a significant security risk. Further details are available at the provided link, which indicates a severe threat to SharePoint environments. No specific bounty payout amount is mentioned in the provided content.
2026-08-26 NEW 2026Hackers target Microsoft SharePoint RCE chain with PoC exploit news 2 min readLibrary for detecting and defending against a chained attack on Microsoft SharePoint, combining CVE-2026-55040 (JWT authentication bypass) with CVE-2026-63520 (Business Connectivity Services RCE). This chain allows unauthenticated attackers to achieve arbitrary code execution on vulnerable servers, with publicly available proof-of-concept exploits weaponized by threat actors shortly after release. CISA has issued directives for federal agencies to secure their SharePoint instances against these and other actively exploited SharePoint vulnerabilities. → bleepingcomputer.com
2026-08-26 NEW 2026Critical Unpatched Vulnerabilities in Kaltura mwEmbed Expose Organizations to Remote Code Execution and File Read Attacks (CVE-2026-19912 CVE-2026-19913) news 4 min readWriteup detailing CVE-2026-19912 and CVE-2026-19913, two critical, unpatched vulnerabilities in Kaltura's mwEmbed (html5lib) player. These flaws allow unauthenticated attackers to perform arbitrary file reads via the `ServiceUrl` parameter and achieve remote code execution through directory traversal in the `uiconf_id` parameter. Exploitation leads to sensitive data exposure, including configuration files and credentials, and the deployment of web shells. Over 600 internet-facing instances are exposed, with no official patch available. → rescana.com
2026-08-26 NEW 2026Unpatched Kaltura mwEmbed Flaws Could Let Remote Attackers Read Files and Run Code news 4 min readWriteup of CVE-2026-19913 and CVE-2026-19912, two unpatched vulnerabilities in Kaltura's mwEmbed HTML5 video player library. These flaws, stemming from unsafe deserialization in mwEmbedLoader.php, allow unauthenticated remote attackers to read arbitrary server files and execute code. The issues affect various v2.x releases and could impact all tenants on shared Kaltura hosting. Mitigation advice includes restricting the endpoint, allow-listing ServiceUrl, rejecting malicious uiconf_id values, and denying PHP execution in cache directories. → thehackernews.com
2026-08-26 NEW 2026Hackers now exploit critical Gitea flaw in code injection attacks news 2 min readVulnerability writeup detailing CVE-2026-60004, a critical code injection flaw in Gitea. This vulnerability, exploitable via the diffpatch API endpoint, allows authenticated users with repository write access, or even unauthenticated attackers on default-configured instances, to execute arbitrary shell commands. Gitea has released version 1.27.1 to patch this issue, and CISA has added it to its Known Exploited Vulnerabilities (KEV) catalog, mandating remediation for federal agencies. → bleepingcomputer.com
2026-08-26 NEW 2026Critical Gitea RCE Actively Exploited as Reported Attack Drops Miner-Like Payload news 3 min readVulnerability describing CVE-2026-60004, a critical remote code execution flaw in Gitea, allows authenticated users with repository write access to execute arbitrary shell commands. This vulnerability, exploitable even by unauthenticated visitors if open registration is enabled, has been actively exploited in the wild, with one reported incident involving the deployment of a cryptocurrency-miner-like dropper that killed competing processes. Gitea versions prior to 1.27.1 are affected, and CISA has added it to its Known Exploited Vulnerabilities catalog. → thehackernews.com
2026-08-26 NEW 2026CISA Warns of Exploited Gitea Vulnerability news 1 min readWriteup on CVE-2026-60004, a critical code injection vulnerability in Gitea that allows an attacker with repository write access to execute shell commands as the Gitea service account by sending a malicious patch to the diffpatch API endpoint. This vulnerability, patched in Gitea version 1.27.1, has been added to CISA's Known Exploited Vulnerabilities (KEV) catalog, and federal agencies were mandated to patch it by August 28. This exploitation follows previous warnings about another Gitea flaw, CVE-2026-20896, which has not yet been added to the KEV catalog. → securityweek.com
2026-08-26 NEW 2026Pwning Call of Duty 1: a 20-year-old RCE, found in an evening with AI advanced TalksAn AI was used to discover a 20-year-old Remote Code Execution (RCE) vulnerability in the original Call of Duty game. The vulnerability was found rapidly in an evening, highlighting the effectiveness of AI in modern cybersecurity research. This discovery demonstrates that even decades-old software can harbor exploitable security flaws.
2026-08-26 NEW 2026From SQL Injection to Remote Code Execution: Following an Unexpected Attack Chain intermediate SQLiThis writeup details a vulnerability discovery, responsibly disclosed and patched. The author followed an unexpected attack chain, starting from SQL injection and escalating to Remote Code Execution. The content emphasizes illustrating the techniques used, not enabling exploitation, with sensitive information redacted. No specific bounty payout amount is mentioned. → infosecwriteups.com
2026-08-26 NEW 2026Google Chrome Multiple Vulnerabilities news 4 min readLibrary of CVEs detailing multiple vulnerabilities in Google Chrome, including CVE-2026-78891 through CVE-2026-79293. Exploitation could lead to remote code execution, elevation of privilege, security restriction bypass, denial of service, information disclosure, and data manipulation. Updates are available from Google for Linux, macOS, and Windows versions. → hkcert.org
2026-08-26 NEW 2026Hackers breached over 270 Zimbra servers in ongoing attacks news 2 min readWriteup on CVE-2026-73570, a high-severity command injection vulnerability affecting Zimbra Collaboration Suite (ZCS). This flaw allows unauthenticated remote code execution by exploiting the SNMP monitoring component when notifications are enabled. Over 270 Zimbra servers have already been compromised in ongoing attacks, with CERT Polska and CISA issuing warnings and mandates for patching. This vulnerability has been frequently exploited by various threat actors, including APT28 and APT29, to steal sensitive data. → bleepingcomputer.com
2026-08-25 NEW 2026Severe vulnerability in Metal Gear Online 3: join the wrong lobby take a critical hit newsA severe vulnerability has been discovered in Metal Gear Online 3. By joining a specifically crafted, incorrect lobby, players can suffer a "critical hit," indicating a significant system compromise or disruption. The exact nature and impact of this vulnerability are not detailed, but it poses a serious risk to users of the game. → cybernews.com
2026-08-25 NEW 2026Google Chrome Multiple Vulnerabilities newsBulletin detailing multiple vulnerabilities in Google Chrome. Exploits can lead to remote code execution, elevation of privilege, and security restriction bypass. Affected versions include those prior to 151.0.7922.173 on Android, Linux, Mac, and Windows, and prior to 151.0.7922.174 on Mac and Windows. Users should update to the latest vendor-released versions. → hkcert.org
2026-08-25 NEW 2026Microsoft Discloses CVSS 10.0 Vulnerability in Entra IDWhy It Went Public Despite No User Action Required news 2 min readAnalysis of CVE-2026-69836, a critical remote code execution vulnerability in Microsoft Entra ID, highlights Microsoft's policy of public disclosure for transparency even when service-side mitigations negate user action. This vulnerability, stemming from insecure deserialization, allowed unauthenticated attackers network code execution, though exploitation was not observed. Separately, a Windows 11 August update introduced a `System.IO.FileFormatException` in WPF applications using specific fonts like Calibri and Cambria when printing or generating PDFs/XPS, with a workaround that compromises a security feature.
2026-08-25 NEW 2026QiAnXin Discloses Critical Remote-Code-Execution Flaw in DeepSeek Harness newsQiAnXin has disclosed a critical remote-code-execution (RCE) vulnerability in DeepSeek Harness. This flaw allows attackers to potentially execute arbitrary code on affected systems. Further details on the specific nature of the vulnerability and its impact are available via the provided link. No payout amount was mentioned in the content.
2026-08-25 NEW 2026Technical Analysis of Microsoft SharePoint Remote Code Execution vulnerability CVE-2026-63520 news 9 min readAnalysis of CVE-2026-63520 reveals a remote code execution vulnerability in Microsoft SharePoint's Business Data Connectivity subsystem. This flaw stems from unrestricted .NET type instantiation within the DbTypeReflector class, allowing an authenticated attacker to upload a malicious .bdcm model file. By triggering entity execution, an attacker can instantiate arbitrary .NET types, manipulate properties, and achieve OS command execution, potentially leveraging gadget chains like System.Windows.Data.ObjectDataProvider to execute commands, similar to techniques used in CVE-2019-1257. When combined with CVE-2026-55040, an authentication bypass, this vulnerability can lead to unauthenticated RCE. → rapid7.com
2026-08-24 NEW 2026CISA orders urgent patching of actively exploited Zimbra flaw news 2 min readWriteup of CVE-2026-73570, an actively exploited command injection vulnerability in Zimbra Collaboration Suite (ZCS). This flaw allows unauthenticated attackers to achieve remote code execution by exploiting improper input sanitization in the SNMP monitoring component when notifications are enabled. CISA has ordered urgent patching for U.S. government agencies, and CERT Polska has observed in-the-wild exploitation. The vulnerability affects ZCS version 10.1.20 and earlier, with successful exploitation potentially leading to the execution of arbitrary operating system commands. → bleepingcomputer.com
2026-08-24 NEW 2026Microsoft warns of max severity Entra ID flaw exploited in attacks news 2 min readAdvisory regarding maximum-severity vulnerabilities in Microsoft Entra ID, Azure Arc, and Exchange Online, including CVE-2026-69836 (untrusted data deserialization for RCE), CVE-2026-65816 and CVE-2026-69555 (privilege escalation on Azure Arc), and CVE-2026-65801 (privilege escalation on Exchange Online). Also notes CVE-2026-65770 for RCE on Azure Managed Instance for Apache Cassandra, and a prior Entra ID privilege escalation flaw CVE-2025-55241. → bleepingcomputer.com
2026-08-23 2026Prompt Injection Is Now an RCE Primitive advancedPrompt injection, a security vulnerability, has evolved into a Remote Code Execution (RCE) primitive. This means attackers can now exploit prompt injection flaws to execute arbitrary code on a victim's system. The provided link offers further details on this emerging threat, highlighting its potential for serious security breaches. → hackernoon.com
2026-08-23 2026Microsoft Entra ID vulnerability scores a perfect 10.0 severity rating newsA critical vulnerability in Microsoft Entra ID has received a perfect 10.0 CVSS score, indicating maximum severity. This flaw could allow attackers to gain elevated privileges within Entra ID. While the article highlights the severity, it does not mention any specific bug bounty payout amounts. The vulnerability underscores the importance of robust security measures for identity and access management systems like Entra ID.
2026-08-23 2026Microsoft Confirms Maximum-Severity Entra ID Vulnerability Exploited In Attacks newsMicrosoft has confirmed a critical vulnerability in Entra ID (formerly Azure Active Directory) that has been actively exploited in attacks. The flaw, identified as CVE-2024-29988, allows authenticated attackers to bypass multi-factor authentication (MFA) and gain unauthorized access to user accounts. While the full scope of the exploitation and the potential impact are still being assessed, Microsoft has released guidance for mitigation and is urging customers to implement the suggested measures to protect their environments. No specific bounty payout amount is mentioned in this content.
2026-08-23 2026Microsoft Entra ID Vulnerability Fix Secures Enterprise Logins news 4 min readVulnerability analysis of CVE-2026-69836, a critical remote code execution flaw in Microsoft Entra ID, detailing its severity (CVSS 10.0), root cause (deserialization of untrusted data), and exploitability (network-based, no privileges or user interaction required). Microsoft has patched this issue, confirming it was not exploited in the wild, and highlighting the increasing role of AI in vulnerability discovery.
2026-08-23 2026Microsoft Patches Critical Entra ID Flaw Rated a Perfect 10 on Severity Scale news 3 min readWriteup on CVE-2026-69836, a critical Entra ID vulnerability rated 10.0 CVSS, allowing unauthenticated remote code execution via deserialization of untrusted data (CWE-502). This flaw, impacting Microsoft's identity platform, shares similarities with past Entra ID deserialization issues like CVE-2026-50652 and CVE-2026-57969. Microsoft has patched the issue server-side without requiring customer action, though transparency concerns regarding independent verification of fixes remain.
2026-08-22 2026No Crash Required: Verifying the Citrix NetScaler SAML Patch for CVE-2026-8452 intermediate 14 min read AuthNTool for verifying the Citrix NetScaler SAML patch for CVE-2026-8452, a heap overflow vulnerability that can lead to remote code execution. This tool allows external verification of the patch status without causing disruption or crashes, by analyzing SAML requests and responses. It aids in identifying exploitation indicators and confirming patch implementation on Gateway and AAA virtual servers, also accounting for sibling vulnerabilities CVE-2026-8451 and CVE-2026-19490. → bishopfox.com
2026-08-22 2026Microsoft Patches Entra ID RCE Vulnerability Exploited in Attacks news 3 min readLibrary of security advisories detailing CVE-2026-69836, a maximum-severity vulnerability in Microsoft Entra ID. This deserialization flaw allowed unauthenticated remote code execution and was exploited in attacks before Microsoft mitigated the issue. While customers need no immediate action, security teams should review Entra ID environments for signs of compromise, focusing on privileged activity, application changes, and suspicious sessions, and implement Zero Trust principles to mitigate identity-based risks. → esecurityplanet.com
2026-08-21 2026Microsoft Rolls Out 22 Fresh Security Patches news 2 min readUpdates from Microsoft address 22 security vulnerabilities, including a critical Entra ID zero-day (CVE-2026-69836) exploited for remote code execution. Other critical flaws patched include elevation-of-privilege bugs in Azure SQL Database (CVE-2026-69502, CVE-2026-68782, CVE-2026-68789, CVE-2026-66309), Azure Arc (CVE-2026-69555, CVE-2026-65816), and Exchange Online (CVE-2026-65801), along with RCE in Azure Managed Instance for Apache Cassandra (CVE-2026-65770). Additionally, Microsoft patched ShieldBreak (CVE-2026-69414), a Defender elevation-of-privilege vulnerability. → securityweek.com
2026-08-21 2026Microsoft confirms maximum severity flaw in Entra ID targeted for exploitation newsMicrosoft has confirmed a maximum severity vulnerability in Entra ID (formerly Azure AD) is actively being exploited. The flaw, classified as critical, poses a significant risk to organizations using the identity and access management service. While the exact impact and scope are still under investigation, the active exploitation suggests immediate attention is required for any entities relying on Entra ID. Further details on the vulnerability and mitigation steps are expected from Microsoft. → cybersecuritydive.com
2026-08-21 2026Critical Isolated-vm Vulnerability Leads to RCE on Host news 2 min readLibrary advisory detailing a critical type confusion vulnerability in `isolated-vm`'s `ExternalCopy` function. This bug, a TOCTOU weakness in data transfer between JavaScript Isolates, allows attackers to hijack control flow and achieve RCE on the host system. Patches are available in `isolated-vm` versions 6.2.0 and 7.0.1. → securityweek.com
2026-08-21 2026U.S. CISA adds TrueConf Server flaws to its Known Exploited Vulnerabilities catalog news 2 min readCatalog entry listing CVE-2026-72529 and CVE-2026-72530, two critical vulnerabilities affecting TrueConf Server. CVE-2026-72529 is a remote code execution flaw exploitable via TCP port 4307, allowing unauthenticated attackers to execute arbitrary scripts. CVE-2026-72530 is a sandbox escape vulnerability on the same port, enabling attackers to break out of isolation and execute arbitrary code on the host system. These flaws, discovered by Vyacheslav Kopeytsev, have been added to CISA's Known Exploited Vulnerabilities catalog, mandating action for federal agencies. → securityaffairs.com
2026-08-21 2026Critical Microsoft Entra ID vulnerability exploited in the wild (CVE-2026-69836) newsWriteup of CVE-2026-69836, a critical remote code execution flaw in Microsoft Entra ID exploited in the wild. Discovered by Microsoft Principal Security Engineer Robert Fitzpatrick, this deserialization vulnerability carried a CVSS score of 10.0 and allowed unauthenticated attackers to execute code over a network. Microsoft has fully mitigated the vulnerability, requiring no customer action. The exploit's origin, timeline, impact, and attacker actions remain undisclosed. → helpnetsecurity.com

Frequently Asked Questions

What is remote code execution?
Remote Code Execution (RCE) is a vulnerability that allows an attacker to run arbitrary commands or code on a target system. It is the most critical class of security vulnerability because it gives the attacker the same level of access as the application or server process, often leading to complete system compromise.
What are common RCE attack vectors?
Common vectors include command injection (unsanitized input passed to shell commands), unsafe deserialization (Java, PHP, Python, .NET), Server-Side Template Injection (Jinja2, Twig, Freemarker), file upload bypasses that execute uploaded code, expression language injection in Java frameworks, and prototype pollution in Node.js leading to code execution.
Why does RCE pay the highest bug bounties?
RCE represents total system compromise — an attacker can read all data, modify the application, pivot to internal networks, and potentially access cloud infrastructure. The impact is maximum, so bounty programs consistently pay their highest rewards for RCE findings, often ranging from $10,000 to $100,000+ depending on the target.

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