Microsoft Windows 11 Version 26H1 vulnerabilities

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-2026-25190 [HIGH] CWE-426 CVE-2026-25190: Untrusted search path in Windows GDI allows an unauthorized attacker to execute code locally. Untrusted search path in Windows GDI allows an unauthorized attacker to execute code locally.

CVE-2026-24296 [HIGH] CWE-362 CVE-2026-24296: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Device Association Service allows an authorized attacker to elevate privileges locally.

CVE-2026-25171 [HIGH] CWE-416 CVE-2026-25171: Use after free in Windows Authentication Methods allows an authorized attacker to elevate privileges Use after free in Windows Authentication Methods allows an authorized attacker to elevate privileges locally.

CVE-2026-23667 [HIGH] CWE-416 CVE-2026-23667: Use after free in Broadcast DVR allows an authorized attacker to elevate privileges locally. Use after free in Broadcast DVR allows an authorized attacker to elevate privileges locally.

CVE-2026-25187 [HIGH] CWE-59 CVE-2026-25187: Improper link resolution before file access ('link following') in Winlogon allows an authorized atta Improper link resolution before file access ('link following') in Winlogon allows an authorized attacker to elevate privileges locally.

CVE-2026-25170 [HIGH] CWE-416 CVE-2026-25170: Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally. Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.

CVE-2026-25188 [HIGH] CWE-122 CVE-2026-25188: Heap-based buffer overflow in Windows Telephony Service allows an unauthorized attacker to elevate p Heap-based buffer overflow in Windows Telephony Service allows an unauthorized attacker to elevate privileges over an adjacent network.

CVE-2026-25177 [HIGH] CWE-641 CVE-2026-25177: Improper restriction of names for files and other resources in Active Directory Domain Services allo Improper restriction of names for files and other resources in Active Directory Domain Services allows an authorized attacker to elevate privileges 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-2026-25181 [HIGH] CWE-125 CVE-2026-25181: Out-of-bounds read in Windows GDI+ allows an unauthorized attacker to disclose information over a ne Out-of-bounds read in Windows GDI+ allows an unauthorized attacker to disclose information over a network.

CVE-2026-24282 [MEDIUM] CWE-125 CVE-2026-24282: Out-of-bounds read in Push Message Routing Service allows an authorized attacker to disclose informa Out-of-bounds read in Push Message Routing Service allows an authorized attacker to disclose information locally.

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.

CVE-2026-25169 [MEDIUM] CWE-369 CVE-2026-25169: Divide by zero in Microsoft Graphics Component allows an unauthorized attacker to deny service local Divide by zero in Microsoft Graphics Component allows an unauthorized attacker to deny service locally.

CVE-2026-25168 [MEDIUM] CWE-476 CVE-2026-25168: Null pointer dereference in Microsoft Graphics Component allows an unauthorized attacker to deny ser Null pointer dereference in Microsoft Graphics Component allows an unauthorized attacker to deny service locally.

CVE-2026-25186 [MEDIUM] CWE-200 CVE-2026-25186: Exposure of sensitive information to an unauthorized actor in Windows Accessibility Infrastructure ( Exposure of sensitive information to an unauthorized actor in Windows Accessibility Infrastructure (ATBroker.exe) allows an authorized attacker to disclose information locally.

CVE-2026-25180 [MEDIUM] CWE-125 CVE-2026-25180: Out-of-bounds read in Microsoft Graphics Component allows an unauthorized attacker to disclose infor Out-of-bounds read in Microsoft Graphics Component allows an unauthorized attacker to disclose information locally.

CVE-2026-21245 [HIGH] CWE-122 CVE-2026-21245: Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges loc Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-21510 [HIGH] CWE-693 CVE-2026-21510: Protection mechanism failure in Windows Shell allows an unauthorized attacker to bypass a security f Protection mechanism failure in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.

CVE-2026-21240 [HIGH] CWE-367 CVE-2026-21240: Time-of-check time-of-use (toctou) race condition in Windows HTTP.sys allows an authorized attacker Time-of-check time-of-use (toctou) race condition in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.