Microsoft Windows 11 26H1 vulnerabilities

CVE-2026-54126 [MEDIUM] CWE-125 CVE-2026-54126: Out-of-bounds read in Windows RDP allows an unauthorized attacker to disclose information over a net Out-of-bounds read in Windows RDP allows an unauthorized attacker to disclose information over a network.

CVE-2026-27929 [HIGH] CWE-367 CVE-2026-27929: Time-of-check time-of-use (toctou) race condition in Windows LUAFV allows an authorized attacker to Time-of-check time-of-use (toctou) race condition in Windows LUAFV allows an authorized attacker to elevate privileges locally.

CVE-2026-45487 [HIGH] CWE-367 CVE-2026-45487: Time-of-check time-of-use (TOCTOU) race condition in Program Compatibility Assistant Service allows Time-of-check time-of-use (TOCTOU) race condition in Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.

CVE-2026-27925 [MEDIUM] CWE-416 CVE-2026-27925: Use after free in Windows Universal Plug and Play (UPnP) Device Host allows an unauthorized attacker Use after free in Windows Universal Plug and Play (UPnP) Device Host allows an unauthorized attacker to disclose information over an adjacent network.

CVE-2026-49165 [HIGH] CWE-908 CVE-2026-49165: Use of uninitialized resource in Microsoft Windows App Store allows an authorized attacker to disclo Use of uninitialized resource in Microsoft Windows App Store allows an authorized attacker to disclose information locally.

CVE-2026-50465 [HIGH] CWE-284 CVE-2026-50465: Improper access control in Microsoft Windows DNS allows an authorized attacker to perform tampering Improper access control in Microsoft Windows DNS allows an authorized attacker to perform tampering locally.

CVE-2026-26152 [HIGH] CWE-922 CVE-2026-26152: Insecure storage of sensitive information in Windows Cryptographic Services allows an authorized att Insecure storage of sensitive information in Windows Cryptographic Services allows an authorized attacker to elevate privileges locally.

CVE-2026-49168 [MEDIUM] CWE-190 CVE-2026-49168: Integer overflow or wraparound in Windows Storage Spaces Direct allows an unauthorized attacker to e Integer overflow or wraparound in Windows Storage Spaces Direct allows an unauthorized attacker to elevate privileges with a physical attack.

CVE-2026-49174 [MEDIUM] CWE-306 CVE-2026-49174: Missing authentication for critical function in Microsoft Windows DNS allows an authorized attacker Missing authentication for critical function in Microsoft Windows DNS allows an authorized attacker to perform tampering locally.

CVE-2026-45658 [MEDIUM] CWE-284 CVE-2026-45658: Improper access control in Windows BitLocker allows an authorized attacker to bypass a security feat Improper access control in Windows BitLocker allows an authorized attacker to bypass a security feature locally.

CVE-2026-50298 [MEDIUM] CWE-190 CVE-2026-50298: Integer overflow or wraparound in Windows Spaceport.sys allows an unauthorized attacker to elevate p Integer overflow or wraparound in Windows Spaceport.sys allows an unauthorized attacker to elevate privileges with a physical attack.

CVE-2026-50299 [MEDIUM] CWE-122 CVE-2026-50299: Integer overflow or wraparound in Windows Storage Spaces Direct allows an unauthorized attacker to e Integer overflow or wraparound in Windows Storage Spaces Direct allows an unauthorized attacker to execute code with a physical attack.

CVE-2026-57097 [MEDIUM] CWE-426 CVE-2026-57097: Untrusted search path in Microsoft XML allows an unauthorized attacker to bypass a security feature Untrusted search path in Microsoft XML allows an unauthorized attacker to bypass a security feature with a physical attack.

CVE-2026-32170 [MEDIUM] CWE-415 CVE-2026-32170: Double free in Windows Rich Text Edit allows an authorized attacker to elevate privileges locally. Double free in Windows Rich Text Edit allows an authorized attacker to elevate privileges locally.

CVE-2026-21530 [MEDIUM] CWE-415 CVE-2026-21530: Double free in Windows Rich Text Edit allows an authorized attacker to elevate privileges locally. Double free in Windows Rich Text Edit allows an authorized attacker to elevate privileges locally.

CVE-2026-40380 [MEDIUM] CWE-122 CVE-2026-40380: Heap-based buffer overflow in Volume Manager Extension Driver allows an authorized attacker to execu Heap-based buffer overflow in Volume Manager Extension Driver allows an authorized attacker to execute code with a physical attack.

CVE-2026-32072 [MEDIUM] CWE-287 CVE-2026-32072: Improper authentication in Windows Active Directory allows an unauthorized attacker to perform spoof Improper authentication in Windows Active Directory allows an unauthorized attacker to perform spoofing locally.

CVE-2026-50418 [MEDIUM] CWE-284 CVE-2026-50418: Improper access control in Windows System allows an unauthorized attacker to bypass a security featu Improper access control in Windows System allows an unauthorized attacker to bypass a security feature locally.

CVE-2026-50374 [MEDIUM] CWE-416 CVE-2026-50374: Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate pr Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges with a physical attack.

CVE-2026-25185 [MEDIUM] CWE-200 CVE-2026-25185: Exposure of sensitive information to an unauthorized actor in Windows Shell Link Processing allows a Exposure of sensitive information to an unauthorized actor in Windows Shell Link Processing allows an unauthorized attacker to perform spoofing over a network.