Microsoft Windows 11 Version 25H2 vulnerabilities

CVE-2026-85827 [HIGH] CWE-122 CVE-2026-85827: Heap-based buffer overflow in WebDAV allows an authorized attacker to elevate privileges locally. Heap-based buffer overflow in WebDAV allows an authorized attacker to elevate privileges locally.

CVE-2026-83683 [MEDIUM] CWE-36 CVE-2026-83683: Absolute path traversal in Windows Encrypting File System (EFS) allows an authorized attacker to dis Absolute path traversal in Windows Encrypting File System (EFS) allows an authorized attacker to disclose information over a network.

CVE-2026-20812 [MEDIUM] CWE-20 CVE-2026-20812: Improper input validation in Windows LDAP - Lightweight Directory Access Protocol allows an authoriz Improper input validation in Windows LDAP - Lightweight Directory Access Protocol allows an authorized attacker to perform tampering over a network.

CVE-2026-85840 [MEDIUM] CWE-552 CVE-2026-85840: Files or directories accessible to external parties in Windows Event Viewer allows an authorized att Files or directories accessible to external parties in Windows Event Viewer allows an authorized attacker to disclose information over a network.

CVE-2026-88137 [MEDIUM] CWE-552 CVE-2026-88137: Files or directories accessible to external parties in WebDAV allows an authorized attacker to discl Files or directories accessible to external parties in WebDAV allows an authorized attacker to disclose information over a network.

CVE-2026-97828 [MEDIUM] CWE-126 CVE-2026-97828: Buffer over-read in DNS Server allows an authorized attacker to disclose information over a network. Buffer over-read in DNS Server allows an authorized attacker to disclose information over a network.

CVE-2025-55698 [HIGH] CWE-476 CVE-2025-55698: Null pointer dereference in Windows DirectX allows an authorized attacker to deny service over a net Null pointer dereference in Windows DirectX allows an authorized attacker to deny service over a network.

CVE-2025-59200 [HIGH] CWE-73 CVE-2025-59200: Concurrent execution using shared resource with improper synchronization ('race condition') in Data Concurrent execution using shared resource with improper synchronization ('race condition') in Data Sharing Service Client allows an unauthorized attacker to perform spoofing locally.

CVE-2026-20816 [HIGH] CWE-367 CVE-2026-20816: Time-of-check time-of-use (toctou) race condition in Windows Installer allows an authorized attacker Time-of-check time-of-use (toctou) race condition in Windows Installer allows an authorized attacker to elevate privileges locally.

CVE-2025-48004 [HIGH] CWE-416 CVE-2025-48004: Use after free in Microsoft Brokering File System allows an unauthorized attacker to elevate privile Use after free in Microsoft Brokering File System allows an unauthorized attacker to elevate privileges locally.

CVE-2025-55693 [HIGH] CWE-416 CVE-2025-55693: Use after free in Windows Kernel allows an unauthorized attacker to elevate privileges locally. Use after free in Windows Kernel allows an unauthorized attacker to elevate privileges locally.

CVE-2025-62213 [HIGH] CWE-416 CVE-2025-62213: Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to ele Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2026-50682 [HIGH] CWE-125 CVE-2026-50682: Out-of-bounds read in Windows Active Directory allows an authorized attacker to deny service over a Out-of-bounds read in Windows Active Directory allows an authorized attacker to deny service over a network.

CVE-2026-83715 [HIGH] CWE-306 CVE-2026-83715: Missing authentication for critical function in Windows Error Reporting allows an authorized attacke Missing authentication for critical function in Windows Error Reporting allows an authorized attacker to perform tampering locally.

CVE-2026-85870 [HIGH] CWE-122 CVE-2026-85870: Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-109453 [HIGH] CWE-122 CVE-2026-109453: Heap-based buffer overflow in Virtual Hard Disk (VHD) Miniport Driver allows an authorized attacker Heap-based buffer overflow in Virtual Hard Disk (VHD) Miniport Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-97810 [HIGH] CWE-122 CVE-2026-97810: Heap-based buffer overflow in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an a Heap-based buffer overflow in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.

CVE-2026-103555 [HIGH] CWE-122 CVE-2026-103555: Heap-based buffer overflow in Virtual Hard Disk (VHD) Miniport Driver allows an authorized attacker Heap-based buffer overflow in Virtual Hard Disk (VHD) Miniport Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-69492 [HIGH] CWE-122 CVE-2026-69492: Heap-based buffer overflow in Windows Partition Management Driver allows an authorized attacker to e Heap-based buffer overflow in Windows Partition Management Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-69563 [HIGH] CWE-122 CVE-2026-69563: Heap-based buffer overflow in Windows Program Compatibility Assistant Service allows an authorized a Heap-based buffer overflow in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.