{"uuid": "0fb93bb9-9c1e-4b31-a60c-f98117d3b269", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-20841", "type": "seen", "source": "https://t.me/CyberSecurityExploit/31152", "content": "\u26a0\ufe0f CVE / ZERO-DAY\n\ud83d\udea8 Windows Zero-Day & Related CVEs (PoC Included)\n\n\ud83e\udde8 1. BlueHammer (CVE-2026-33825)\n\u2022 Type: Local Privilege Escalation (LPE)\n\u2022 Impact: User \u2192 SYSTEM privileges\n\u2022 Features:\n   \u2022 Exploits Windows Defender update mechanism\n   \u2022 TOCTOU + Path Confusion\n\u2022 Status:\n   \u2022 PoC publicly available\n   \u2022 Used in real-world attacks\n   \u2022 Patched\n\n\ud83d\udccc GitHub PoC\nhttps://github.com/Nightmare-Eclipse/BlueHammer\n\n\ud83d\udd25 2. RedSun (Windows Defender Zero-Day)\n\u2022 Type: Local Privilege Escalation (LPE)\n\u2022 Impact: SYSTEM privileges\n\u2022 Features:\n   \u2022 Reparse Point + file overwrite\n   \u2022 Abuses Defender logic\n\u2022 Status:\n   \u2022 PoC publicly available\n   \u2022 Actively exploited\n   \u2022 Unpatched in some environments\n\n\ud83d\udccc GitHub PoC\nhttps://github.com/Nightmare-Eclipse/RedSun\n\n\u2620\ufe0f 3. UnDefend\n\u2022 Type: Defender Disable / DoS\n\u2022 Impact:\n  \u2022 Blocks Defender updates\n  \u2022 Disables security protections\n\u2022 Features:\n  \u2022 Works with standard user privileges\n  \u2022 Critical in attack chains\n\u2022 Status:\n  \u2022 PoC publicly available\n  \u2022 Partially unpatched\n\n\ud83d\udccc GitHub PoC\nhttps://github.com/Nightmare-Eclipse/UnDefend\n\n\ud83d\udca5 4. CVE-2026-20841 (Windows Notepad RCE)\n\u2022 Type: Remote Code Execution (RCE)\n\u2022 Condition:\n   \u2022 Opening a malicious Markdown file\n\u2022 Features:\n   \u2022 Improper input validation\n   \u2022 Multiple PoCs available\n\n\ud83d\udccc GitHub PoC\nhttps://github.com/404godd/CVE-2026-20841-PoC\nhttps://github.com/dogukankurnaz/CVE-2026-20841-PoC\nhttps://github.com/hackfaiz/CVE-2026-20841-PoC\nhttps://github.com/tangent65536/CVE-2026-20841\nhttps://github.com/SecureWithUmer/CVE-2026-20841\nhttps://github.com/EleniChristopoulou/PoC-CVE-2026-20841\n\n\ud83d\udd0d 5. CVE-2026-20805 (DWM Info Leak)\n\u2022 Type: Information Disclosure\n\u2022 Features:\n   \u2022 Used in exploit chains\n   \u2022 Provides leak primitives\n\u2022 Status:\n   \u2022 PoC publicly available\n\n\ud83d\udccc GitHub PoC\nhttps://github.com/fevar54/CVE-2026-20805-POC\nhttps://github.com/Uzair-Baig0900/CVE-2026-20805-PoC\n\n\ud83d\udca3 6. CVE-2026-29923 (BYOVD LPE)\n\u2022 Type: Local Privilege Escalation (LPE)\n\u2022 Features:\n   \u2022 BYOVD (Bring Your Own Vulnerable Driver)\n   \u2022 IOCTL-based SYSTEM privilege escalation\n\u2022 Status:\n   \u2022 PoC publicly available\n\n\ud83d\udccc GitHub PoC\nhttps://github.com/athenasec16/CVE-2026-29923\nhttps://github.com/Smarttfoxx/CVE-2026-29923\n\n\ud83d\udda5 7. CVE-2026-23668 (Windows Graphics)\n\u2022 Type: LPE / RCE\n\u2022 Features:\n   \u2022 Race condition vulnerability\n\u2022 Status:\n   \u2022 No public GitHub PoC (as of now)\n\n\u26a0\ufe0f Example Attack Chain\nInitial Access (Notepad / MSHTML)\n        \u2193\nInfo Leak (DWM - CVE-2026-20805)\n        \u2193\nPrivilege Escalation (RedSun / BlueHammer / BYOVD)\n        \u2193\nDefender Disable (UnDefend)\n\n\ud83d\udccc Key Takeaways\n\u2714\ufe0f Confirmed GitHub PoCs\n\u2022 BlueHammer\n\u2022 RedSun\n\u2022 UnDefend\n\u2022 CVE-2026-20841\n\u2022 CVE-2026-20805\n\u2022 CVE-2026-29923\n\u2714\ufe0f Full attack chain possible\n\u2192 Initial access \u2192 Info leak \u2192 Privilege escalation \u2192 Defense bypass\n\u2714\ufe0f Current risk level\n\ud83d\udc49 Defender-related vulnerabilities included\n\ud83d\udc49 Some remain unpatched\n\ud83d\udc49 Practical real-world exploitation possible\n\n\u2796\u2796\u2796\u2796\u2796\u2796\u2796\u2796\u2796\u2796\n\n\ud83d\udd10 Cyber Security Exploit Community\nTelegram Group\nhttps://t.me/Cyber_Security_Exploit\n\nTelegram Channel\nhttps://t.me/CyberSecurityExploit\n\nResearch \u2022 Ethical Hacking \u2022 Red Team", "creation_timestamp": "2026-08-15T12:00:03.349762Z"}