Microsoft Windows 10 21H2 vulnerabilities

CVE-2026-21238 [HIGH] CWE-284 CVE-2026-21238: Improper access control in Windows Ancillary Function Driver for WinSock allows an authorized attack Improper access control in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2025-49740 [HIGH] CWE-693 CVE-2025-49740: Protection mechanism failure in Windows SmartScreen allows an unauthorized attacker to bypass a secu Protection mechanism failure in Windows SmartScreen allows an unauthorized attacker to bypass a security feature over a network.

CVE-2026-24291 [HIGH] CWE-732 CVE-2026-24291: Incorrect permission assignment for critical resource in Windows Accessibility Infrastructure (ATBro Incorrect permission assignment for critical resource in Windows Accessibility Infrastructure (ATBroker.exe) allows an authorized attacker to elevate privileges locally.

CVE-2026-69784 [HIGH] CWE-416 CVE-2026-69784: Use after free in Windows Hello allows an authorized attacker to elevate privileges locally. Use after free in Windows Hello allows an authorized attacker to elevate privileges locally.

CVE-2025-24035 [HIGH] CWE-591 CVE-2025-24035: Sensitive data storage in improperly locked memory in Windows Remote Desktop Services allows an unau Sensitive data storage in improperly locked memory in Windows Remote Desktop Services allows an unauthorized attacker to execute code over a network.

CVE-2026-27914 [HIGH] CWE-284 CVE-2026-27914: Improper access control in Microsoft Management Console allows an authorized attacker to elevate pri Improper access control in Microsoft Management Console allows an authorized attacker to elevate privileges locally.

CVE-2025-21295 [HIGH] CWE-416 CVE-2025-21295: SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Remote Code Execution Vulnerability SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Remote Code Execution Vulnerability

CVE-2025-59516 [HIGH] CWE-73 CVE-2025-59516: Missing authentication for critical function in Windows Storage VSP Driver allows an authorized atta Missing authentication for critical function in Windows Storage VSP Driver allows an authorized attacker to elevate privileges locally.

CVE-2025-62454 [HIGH] CWE-122 CVE-2025-62454: Heap-based buffer overflow in Windows Cloud Files Mini Filter Driver allows an authorized attacker t Heap-based buffer overflow in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

CVE-2025-62472 [HIGH] CWE-416 CVE-2025-62472: Use of uninitialized resource in Windows Remote Access Connection Manager allows an authorized attac Use of uninitialized resource in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges locally.

CVE-2026-26132 [HIGH] CWE-416 CVE-2026-26132: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally. Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-69638 [HIGH] CWE-122 CVE-2026-69638: Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.

CVE-2026-69479 [HIGH] CWE-122 CVE-2026-69479: Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.

CVE-2026-54122 [HIGH] CWE-122 CVE-2026-54122: Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code locally.

CVE-2026-25166 [HIGH] CWE-502 CVE-2026-25166: Deserialization of untrusted data in Windows System Image Manager allows an authorized attacker to e Deserialization of untrusted data in Windows System Image Manager allows an authorized attacker to execute code locally.

CVE-2026-25173 [HIGH] CWE-122 CVE-2026-25173: Integer overflow or wraparound in Windows Routing and Remote Access Service (RRAS) allows an authori Integer overflow or wraparound in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to execute code over a network.

CVE-2026-69623 [HIGH] CWE-122 CVE-2026-69623: Heap-based buffer overflow in Windows HTTP Print Provider allows an authorized attacker to execute c Heap-based buffer overflow in Windows HTTP Print Provider allows an authorized attacker to execute code over a network.

CVE-2026-20922 [HIGH] CWE-122 CVE-2026-20922: Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally. Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.

CVE-2026-69847 [HIGH] CWE-122 CVE-2026-69847: Heap-based buffer overflow in Windows DHCP Server allows an authorized attacker to execute code over Heap-based buffer overflow in Windows DHCP Server allows an authorized attacker to execute code over an adjacent network.

CVE-2026-23674 [HIGH] CWE-41 CVE-2026-23674: Improper resolution of path equivalence in Windows MapUrlToZone allows an unauthorized attacker to b Improper resolution of path equivalence in Windows MapUrlToZone allows an unauthorized attacker to bypass a security feature over a network.