Microsoft Defender Vulnerability
Microsoft Defender contains an insufficient granularity of access control vulnerability that could allow an authorized attacker to escalate privileges locally.
CVSS Score
9.8
CRITICAL
Published
22 Apr 2026 00:00
Modified
N/A
Vendor
Microsoft
Product
Defender
Source
CIRCL
Affected Versions
Fix
Vendor Patch / Mitigation Available
Weaknesses (CWE)
CWE-1220
Affected Systems
Microsoft
Defender
Microsoft
Windows Ancillary Function Driver For WinSock
SharePoint
Active Directory Federation Services
SharePoint Server
Windows
DirectX
Internet Explorer
Defender
Microsoft
Office
Visual Basic For Applications (VBA)
External Links
KEV Status
Known Exploited Vulnerability