High severity7.0NVD Advisory· Published Aug 11, 2026· Updated Aug 13, 2026
CVE-2026-65776
CVE-2026-65776
Description
Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
Affected products
8cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*+ 1 more
- cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*range: <10.0.26100.9106
- cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*range: <10.0.26100.9106
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*+ 1 more
- cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*range: <10.0.26200.9106
- cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*range: <10.0.26200.9106
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*+ 1 more
- cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*range: <10.0.28000.2704
- cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*range: <10.0.28000.2704
- cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*Range: <10.0.26100.33222
Patches
Vulnerability mechanics
References
1- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65776nvdPatchVendor Advisory
News mentions
7- Patch Tuesday - August 2026Rapid7 Blog · Aug 11, 2026
- Microsoft Patch Tuesday Update August 2026 – 394 Vulnerabilities Fixed, Including 3 Zero-DaysCyber Security News · Aug 11, 2026
- Windows 11 26h1: 25 Vulnerabilities Patched, Including Actively Exploited Privilege Escalation FlawVypr Intelligence · Aug 11, 2026
- Microsoft Windows 11 24H2: 25 Vulnerabilities Patched, Including Actively Exploited Zero-DayVypr Intelligence · Aug 11, 2026
- Windows Server 2025: 25 Vulnerabilities Patched, Including Exploited Zero-DayVypr Intelligence · Aug 11, 2026
- Windows 11 24H2: 25 Vulnerabilities Patched, Including Exploited Zero-Day CVE-2026-68820Vypr Intelligence · Aug 11, 2026
- ZDI-26-540: (Pwn2Own) Microsoft Windows win32kfull Use-After-Free Information Disclosure VulnerabilityZero Day Initiative · Aug 11, 2026