Windows Defender (MsMpEng.exe) - Race Condition
Windows Defender (MsMpEng.exe) - Race Condition
AI Analysis
Technical Summary
This vulnerability concerns a race condition in the Windows Defender Antivirus executable MsMpEng.exe. A race condition occurs when the timing of actions can lead to unexpected behavior, potentially allowing an attacker to interfere with normal operation. The exploit code has been published by the author 'nu11secur1ty' and is available on Exploit-DB (ID 52612). No detailed technical description or affected versions are provided, and no vendor patch or advisory is referenced.
Potential Impact
The vulnerability could allow a local attacker to exploit timing issues within Windows Defender Antivirus, potentially leading to unauthorized behavior or privilege escalation. However, there is no evidence of active exploitation in the wild. The exact impact is not detailed due to limited information.
Mitigation Recommendations
Patch status is not yet confirmed — check the Microsoft vendor advisory for current remediation guidance. Until an official fix is released, monitor for updates from Microsoft and apply any security patches promptly once available.
Indicators of Compromise
- exploit-code: # Titles: Windows Defender (MsMpEng.exe) - Race Condition # Author: nu11secur1ty # Date: 2026-06-11 # Vendor: Microsoft Corporation # Software: Windows Defender Antivirus (MsMpEng.exe) # Reference: https://gitlab.com/nu11secur1ty/0/-/raw/main/README.md?ref_type=heads ## Description: A race condition exists between Windows Defender's `MpCleanCallbackFunction` (cleanup routine) and Volume Shadow Copy creation. Successful exploitation results in: 1. LPE (Local Privilege Escalation) to NT AUTHORITY\SYSTEM via `CreateProcessAsUser` 2. Use-after-free condition causing Windows Defender (`MsMpEng.exe`) to crash 3. System remains without antivirus protection for the session The exploit uses: - Fake ISO mount via `OpenVirtualDisk` / `AttachVirtualDisk` - Real-time priority escalation (`REALTIME_PRIORITY_CLASS` + `THREAD_PRIORITY_TIME_CRITICAL`) - Speed racing against Defender's cleanup routine **STATUS: HIGH - Critical (0-Day / LPE)** Exploit: [url](https://gitlab.com/nu11secur1ty/0.git) Demo: [url](https://www.patreon.com/nu11secur1ty/posts/honda-exploit-160798929) Time spent: 9:10:00 -- System Administrator - Infrastructure Engineer Penetration Testing Engineer Exploit developer at https://packetstormsecurity.com/ https://cve.mitre.org/index.html https://cxsecurity.com/ and https://www.exploit-db.com/ home page: https://www.asc3t1c-nu11secur1ty.com/ hiPEnIMR0v7QCo/+SEH9gBclAAYWGnPoBIQ75sCj60E= nu11secur1ty https://www.asc3t1c-nu11secur1ty.com/ -- System Administrator - Infrastructure Engineer Penetration Testing Engineer Exploit developer at https://packetstorm.news/ https://cve.mitre.org/index.html https://cxsecurity.com/ and https://www.exploit-db.com/ 0day Exploit DataBase https://0day.today/ home page: https://www.asc3t1c-nu11secur1ty.com/ hiPEnIMR0v7QCo/+SEH9gBclAAYWGnPoBIQ75sCj60E= nu11secur1ty <http://nu11secur1ty.com/>
Windows Defender (MsMpEng.exe) - Race Condition
Description
Windows Defender (MsMpEng.exe) - Race Condition
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability concerns a race condition in the Windows Defender Antivirus executable MsMpEng.exe. A race condition occurs when the timing of actions can lead to unexpected behavior, potentially allowing an attacker to interfere with normal operation. The exploit code has been published by the author 'nu11secur1ty' and is available on Exploit-DB (ID 52612). No detailed technical description or affected versions are provided, and no vendor patch or advisory is referenced.
Potential Impact
The vulnerability could allow a local attacker to exploit timing issues within Windows Defender Antivirus, potentially leading to unauthorized behavior or privilege escalation. However, there is no evidence of active exploitation in the wild. The exact impact is not detailed due to limited information.
Mitigation Recommendations
Patch status is not yet confirmed — check the Microsoft vendor advisory for current remediation guidance. Until an official fix is released, monitor for updates from Microsoft and apply any security patches promptly once available.
Technical Details
- Vendor
- Microsoft Corporation
- Application
- Windows Defender Antivirus
- Author
- nu11secur1ty
- Edb Id
- 52612
- Has Exploit Code
- true
- Code Language
- text
Indicators of Compromise
Exploit Source Code
Exploit code for Windows Defender (MsMpEng.exe) - Race Condition
# Titles: Windows Defender (MsMpEng.exe) - Race Condition # Author: nu11secur1ty # Date: 2026-06-11 # Vendor: Microsoft Corporation # Software: Windows Defender Antivirus (MsMpEng.exe) # Reference: https://gitlab.com/nu11secur1ty/0/-/raw/main/README.md?ref_type=heads ## Description: A race condition exists between Windows Defender's `MpCleanCallbackFunction` (cleanup routine) and Volume Shadow Copy creation. Successful exploitation results in: 1. LPE (Local Privilege Escalation) to NT AUTHORI... (1387 more characters)
Threat ID: 6a4c4f4d27e9c797199c909f
Added to database: 07/07/2026, 00:58:53 UTC
Last enriched: 08/15/2026, 05:02:29 UTC
Last updated: 08/20/2026, 05:00:08 UTC
Views: 115
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