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BlueHammer is an elevation-of-privilege vulnerability in the Microsoft Defender Antimalware Platform caused by insufficient granularity of access control. Public technical reporting describes exploitation as a time-of-check to time-of-use race involving Defender file scanning, path confusion, and manipulation of Volume Shadow Copy behavior. The race can cause privileged Defender operations to act on an attacker-controlled or redirected path, enabling local privilege escalation.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (5 hidden).
Small Windows-focused exploit repository for CVE-2026-33825 containing a single substantive source file, src/main.cpp, built with CMake. The code is a local privilege-escalation style PoC rather than a remote exploit. It uses low-level Windows and NT native APIs from ntdll.dll, plus Cloud Files API headers/libraries, to manipulate filesystem objects, enumerate object-manager directories, and set reparse points/mount points. The exploit workflow appears to prepare filesystem redirection primitives, race or coerce privileged file operations, then open \??\C:\Windows\System32\TieringEngineService.exe with FILE_SUPERSEDE semantics. After successful overwrite/placement, it copies its own executable into %WINDIR%\System32\TieringEngineService.exe and invokes LaunchTierManagementEng() to trigger execution. Repository structure is minimal: CMakeLists.txt for building, a short README naming CVE-2026-33825, and one large C++ implementation file. No network communication, C2, or external URLs are present; the exploit is entirely local and centered on Windows filesystem/object-manager abuse and privileged binary planting.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
206 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Microsoft Defender privilege-escalation vulnerability involving a TOCTOU race and path confusion. It is relevant as the proposed escalation path and precedent for ShieldCrash weaponization.
Local privilege escalation vulnerability in Microsoft Defender that allows escalation to SYSTEM and is described as used in ransomware operations.
A high-severity Microsoft Defender privilege escalation vulnerability, dubbed BlueHammer, that can be used to access the SAM database and local account password hashes.
A local privilege escalation vulnerability in Microsoft Defender, referred to as BlueHammer, that CISA says is being actively exploited in ransomware attacks.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.