Microsoft Windows 10 21H2 vulnerabilities

CVE-2025-54895 [HIGH] CWE-190 CVE-2025-54895: Integer overflow or wraparound in Windows SPNEGO Extended Negotiation allows an authorized attacker Integer overflow or wraparound in Windows SPNEGO Extended Negotiation allows an authorized attacker to elevate privileges locally.

CVE-2025-27738 [MEDIUM] CWE-284 CVE-2025-27738: Improper access control in Windows Resilient File System (ReFS) allows an authorized attacker to dis Improper access control in Windows Resilient File System (ReFS) allows an authorized attacker to disclose information over a network.

CVE-2025-29842 [HIGH] CWE-349 CVE-2025-29842: Acceptance of extraneous untrusted data with trusted data in UrlMon allows an unauthorized attacker Acceptance of extraneous untrusted data with trusted data in UrlMon allows an unauthorized attacker to bypass a security feature over a network.

CVE-2025-54911 [HIGH] CWE-416 CVE-2025-54911: Use after free in Windows BitLocker allows an authorized attacker to elevate privileges locally. Use after free in Windows BitLocker allows an authorized attacker to elevate privileges locally.

CVE-2026-69710 [HIGH] CWE-362 CVE-2026-69710: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Hello allows an authorized attacker to elevate privileges locally.

CVE-2025-54103 [HIGH] CWE-416 CVE-2025-54103: Use after free in Windows Management Services allows an unauthorized attacker to elevate privileges Use after free in Windows Management Services allows an unauthorized attacker to elevate privileges locally.

CVE-2025-49690 [HIGH] CWE-362 CVE-2025-49690: Concurrent execution using shared resource with improper synchronization ('race condition') in Capab Concurrent execution using shared resource with improper synchronization ('race condition') in Capability Access Management Service (camsvc) allows an unauthorized attacker to elevate privileges locally.

CVE-2026-27921 [HIGH] CWE-362 CVE-2026-27921: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.

CVE-2026-69452 [HIGH] CWE-416 CVE-2026-69452: Use after free in Windows Enterprise App Management allows an authorized attacker to elevate privile Use after free in Windows Enterprise App Management allows an authorized attacker to elevate privileges over a network.

CVE-2026-69451 [HIGH] CWE-416 CVE-2026-69451: Use after free in Windows Management Instrumentation allows an authorized attacker to elevate privil Use after free in Windows Management Instrumentation allows an authorized attacker to elevate privileges over a network.

CVE-2026-68835 [HIGH] CWE-416 CVE-2026-68835: Use after free in Windows Print Spooler Components allows an authorized attacker to elevate privileg Use after free in Windows Print Spooler Components allows an authorized attacker to elevate privileges over a network.

CVE-2026-69358 [HIGH] CWE-908 CVE-2026-69358: Use of uninitialized resource in Remote Desktop Client allows an authorized attacker to execute code Use of uninitialized resource in Remote Desktop Client allows an authorized attacker to execute code over a network.

CVE-2026-85856 [HIGH] CWE-122 CVE-2026-85856: Heap-based buffer overflow in Windows Internet Connection Sharing (ICS) allows an authorized attacke Heap-based buffer overflow in Windows Internet Connection Sharing (ICS) allows an authorized attacker to execute code over an adjacent network.

CVE-2026-83580 [HIGH] CWE-122 CVE-2026-83580: Heap-based buffer overflow in Windows Client-Side Caching (CSC) Service allows an authorized attacke Heap-based buffer overflow in Windows Client-Side Caching (CSC) Service allows an authorized attacker to elevate privileges locally.

CVE-2026-100201 [HIGH] CWE-122 CVE-2026-100201: Heap-based buffer overflow in Windows Client License Service allows an authorized attacker to elevat Heap-based buffer overflow in Windows Client License Service allows an authorized attacker to elevate privileges locally.

CVE-2026-100203 [HIGH] CWE-122 CVE-2026-100203: Heap-based buffer overflow in Windows Update Service allows an authorized attacker to elevate privil Heap-based buffer overflow in Windows Update Service allows an authorized attacker to elevate privileges locally.

CVE-2026-83724 [HIGH] CWE-122 CVE-2026-83724: Heap-based buffer overflow in Windows Management Instrumentation allows an authorized attacker to el Heap-based buffer overflow in Windows Management Instrumentation allows an authorized attacker to elevate privileges locally.

CVE-2026-83921 [HIGH] CWE-122 CVE-2026-83921: Heap-based buffer overflow in Microsoft Windows Search Component allows an authorized attacker to el Heap-based buffer overflow in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

CVE-2026-41108 [HIGH] CWE-122 CVE-2026-41108: Heap-based buffer overflow in Microsoft Windows DNS allows an authorized attacker to elevate privile Heap-based buffer overflow in Microsoft Windows DNS allows an authorized attacker to elevate privileges locally.

CVE-2026-69970 [HIGH] CWE-122 CVE-2026-69970: Heap-based buffer overflow in Microsoft Streaming Service allows an authorized attacker to elevate p Heap-based buffer overflow in Microsoft Streaming Service allows an authorized attacker to elevate privileges locally.