Microsoft Windows 11 23H2 vulnerabilities

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-2026-42981 [HIGH] CWE-191 CVE-2026-42981: Integer underflow (wrap or wraparound) in Windows Performance Monitor allows an unauthorized attacke Integer underflow (wrap or wraparound) in Windows Performance Monitor allows an unauthorized attacker to execute code over a network.

CVE-2026-42974 [HIGH] CWE-190 CVE-2026-42974: Integer overflow or wraparound in Windows Performance Monitor allows an unauthorized attacker to exe Integer overflow or wraparound in Windows Performance Monitor allows an unauthorized attacker to execute code over a network.

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-2025-62458 [HIGH] CWE-122 CVE-2025-62458: Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to elevate privile Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

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.

CVE-2026-20929 [HIGH] CWE-284 CVE-2026-20929: Improper access control in Windows HTTP.sys allows an authorized attacker to elevate privileges over Improper access control in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network.

CVE-2024-26158 [HIGH] CWE-59 CVE-2024-26158: Microsoft Install Service Elevation of Privilege Vulnerability Microsoft Install Service Elevation of Privilege Vulnerability

CVE-2026-20849 [HIGH] CWE-807 CVE-2026-20849: Reliance on untrusted inputs in a security decision in Windows Kerberos allows an authorized attacke Reliance on untrusted inputs in a security decision in Windows Kerberos allows an authorized attacker to elevate privileges over a network.

CVE-2024-38180 [HIGH] CWE-693 CVE-2024-38180: Windows SmartScreen Security Feature Bypass Vulnerability Windows SmartScreen Security Feature Bypass Vulnerability

CVE-2025-21332 [HIGH] CWE-41 CVE-2025-21332: MapUrlToZone Security Feature Bypass Vulnerability MapUrlToZone Security Feature Bypass Vulnerability

CVE-2025-29967 [HIGH] CWE-122 CVE-2025-29967: Heap-based buffer overflow in Remote Desktop Gateway Service allows an unauthorized attacker to exec Heap-based buffer overflow in Remote Desktop Gateway Service allows an unauthorized attacker to execute code over a network.

CVE-2024-49117 [HIGH] CWE-393 CVE-2024-49117: Windows Hyper-V Remote Code Execution Vulnerability Windows Hyper-V Remote Code Execution Vulnerability

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-2025-55692 [HIGH] CWE-20 CVE-2025-55692: Improper input validation in Windows Error Reporting allows an authorized attacker to elevate privil Improper input validation in Windows Error Reporting allows an authorized attacker to elevate privileges locally.

CVE-2025-59512 [HIGH] CWE-284 CVE-2025-59512: Improper access control in Customer Experience Improvement Program (CEIP) allows an authorized attac Improper access control in Customer Experience Improvement Program (CEIP) allows an authorized attacker to elevate privileges locally.

CVE-2024-20698 [HIGH] CWE-190 CVE-2024-20698: Windows Kernel Elevation of Privilege Vulnerability Windows Kernel Elevation of Privilege Vulnerability

CVE-2026-21231 [HIGH] CWE-362 CVE-2026-21231: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2024-30020 [HIGH] CWE-122 CVE-2024-30020: Windows Cryptographic Services Remote Code Execution Vulnerability Windows Cryptographic Services Remote Code Execution Vulnerability

CVE-2024-49126 [HIGH] CWE-416 CVE-2024-49126: Windows Local Security Authority Subsystem Service (LSASS) Remote Code Execution Vulnerability Windows Local Security Authority Subsystem Service (LSASS) Remote Code Execution Vulnerability