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Microsoft Security Response Center

CVE-2026-20877: Windows Management Services Elevation of Privilege Vulnerability

Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.

Microsoft Security Response Center
#vulnerability#windows#auth#Windows Management Services#Security Vulnerability
CVE-2026-20876: Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability

**What privileges could be gained by an attacker who successfully exploited this vulnerability?** An attacker who successfully exploited this vulnerability could gain Virtual Trust Level 2 (VTL2) privileges.

CVE-2026-20869: Windows Local Session Manager (LSM) Elevation of Privilege Vulnerability

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Local Session Manager (LSM) allows an authorized attacker to elevate privileges locally.

CVE-2026-20860: Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.