CVE-2026-20876CriticalCVSS 6.7

Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability

Published
June 2, 2026
Last Modified
—

🔗 CVE IDs covered (1)

📋 Description

Heap-based buffer overflow in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.

🎯 Affected products9

  • Windows 11 Version 23H2 for ARM64-based Systems
  • Windows 11 Version 23H2 for x64-based Systems
  • Windows 11 Version 24H2 for ARM64-based Systems
  • Windows 11 Version 24H2 for x64-based Systems
  • Windows 11 Version 25H2 for ARM64-based Systems
  • Windows 11 Version 25H2 for x64-based Systems
  • Windows Server 2022, 23H2 Edition (Server Core installation)
  • Windows Server 2025
  • Windows Server 2025 (Server Core installation)

✅ Remediation

KB5073379 (Security Update) — fixed build 10.0.26100.32230 KB5074109 (Security Update) — fixed build 10.0.26200.7623 KB5073455 (Security Update) — fixed build 10.0.22631.6491 KB5073450 (Security Update) — fixed build 10.0.25398.2092 KB5074109 (Security Update) — fixed build 10.0.26100.7623

🔗 References (10)