CVE-2021-43226
unknown
KEV
CVSS v3
—
CVSS v4 NEW
—
VIR risk
1.5
Description
Microsoft Windows Common Log File System Driver contains a privilege escalation vulnerability that could allow a local, privileged attacker to bypass certain security mechanisms.
CISA KEV
- Vendor
- Microsoft
- Product
- Windows
- Due date
- 2025-10-27
Predictions
Exploit likelihood
99%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Mitigation details
Source: Microsoft Security Response Center · View original ↗ · proprietary-no-redistribution
Full prose not cached — VIR stores only structured fields (affected/fixed versions, references) for this source. Click "View original" above for the vendor's full advisory.
Affected
| Vendor | Product | Version |
|---|---|---|
| microsoft | Windows 7 for 32-bit Systems Service Pack 1 | |
| microsoft | Windows 7 for x64-based Systems Service Pack 1 | |
| microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | |
| microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | |
| microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | |
| microsoft | Windows Server 2012 | |
| microsoft | Windows Server 2012 (Server Core installation) | |
| microsoft | Windows 8.1 for 32-bit systems | |
| microsoft | Windows 8.1 for x64-based systems | |
| microsoft | Windows Server 2012 R2 | |
| microsoft | Windows RT 8.1 | |
| microsoft | Windows Server 2012 R2 (Server Core installation) | |
| microsoft | Microsoft Office 2013 Service Pack 1 (32-bit editions) | |
| microsoft | Microsoft Office 2013 Service Pack 1 (64-bit editions) | |
| microsoft | Microsoft Office 2013 RT Service Pack 1 | |
| microsoft | Microsoft Office Web Apps Server 2013 Service Pack 1 | |
| microsoft | Microsoft SharePoint Foundation 2013 Service Pack 1 | |
| microsoft | Microsoft Excel 2013 Service Pack 1 (32-bit editions) | |
| microsoft | Microsoft Excel 2013 Service Pack 1 (64-bit editions) | |
| microsoft | Microsoft Excel 2013 RT Service Pack 1 | |
| microsoft | Windows 10 for 32-bit Systems | |
| microsoft | Windows 10 for x64-based Systems | |
| microsoft | Microsoft Excel 2016 (32-bit edition) | |
| microsoft | Microsoft Excel 2016 (64-bit edition) | |
| microsoft | Microsoft Office 2016 (32-bit edition) | |
| microsoft | Microsoft Office 2016 (64-bit edition) | |
| microsoft | Windows Server 2016 | |
| microsoft | Office Online Server | |
| microsoft | Windows 10 Version 1607 for 32-bit Systems | |
| microsoft | Windows 10 Version 1607 for x64-based Systems | |
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
References
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.