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-2026-62750 [MEDIUM] CWE-187 CVE-2026-62750: Partial string comparison in Windows HTTP Protocol Stack allows an unauthorized attacker to perform Partial string comparison in Windows HTTP Protocol Stack allows an unauthorized attacker to perform tampering over an adjacent network.

CVE-2026-62757 [MEDIUM] CWE-347 CVE-2026-62757: Improper verification of cryptographic signature in Windows Schannel allows an unauthorized attacker Improper verification of cryptographic signature in Windows Schannel allows an unauthorized attacker to bypass a security feature over a network.

CVE-2026-69640 [MEDIUM] CWE-863 CVE-2026-69640: Incorrect authorization in Windows Key Distribution Center allows an authorized attacker to bypass a Incorrect authorization in Windows Key Distribution Center allows an authorized attacker to bypass a security feature over a network.

CVE-2026-85939 [MEDIUM] CWE-1390 CVE-2026-85939: Weak authentication in Windows Kernel allows an authorized attacker to bypass a security feature ove Weak authentication in Windows Kernel allows an authorized attacker to bypass a security feature over a 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-2026-85362 [HIGH] CWE-763 CVE-2026-85362: Release of invalid pointer or reference in Windows Management Instrumentation allows an authorized a Release of invalid pointer or reference in Windows Management Instrumentation allows an authorized attacker to elevate privileges locally.

CVE-2026-83750 [HIGH] CWE-122 CVE-2026-83750: Time-of-check time-of-use (toctou) race condition in Windows Error Reporting allows an authorized at Time-of-check time-of-use (toctou) race condition in Windows Error Reporting allows an authorized attacker to elevate privileges locally.

CVE-2026-47648 [HIGH] CWE-426 CVE-2026-47648: Untrusted search path in Windows Storage allows an authorized attacker to elevate privileges locally Untrusted search path in Windows Storage allows an authorized attacker to elevate privileges locally.

CVE-2026-78464 [HIGH] CWE-367 CVE-2026-78464: Time-of-check time-of-use (toctou) race condition in Windows MIDI Service Module allows an authorize Time-of-check time-of-use (toctou) race condition in Windows MIDI Service Module allows an authorized attacker to elevate privileges locally.

CVE-2026-69859 [HIGH] CWE-191 CVE-2026-69859: Time-of-check time-of-use (toctou) race condition in Windows USB Audio Class driver (usbaudio.sys) a Time-of-check time-of-use (toctou) race condition in Windows USB Audio Class driver (usbaudio.sys) allows an authorized attacker to elevate privileges locally.

CVE-2026-69440 [HIGH] CWE-367 CVE-2026-69440: Time-of-check time-of-use (toctou) race condition in Windows MIDI Service Module allows an authorize Time-of-check time-of-use (toctou) race condition in Windows MIDI Service Module allows an authorized attacker to elevate privileges locally.

CVE-2026-88098 [HIGH] CWE-822 CVE-2026-88098: Untrusted pointer dereference in Windows Security Support Provider Interface allows an authorized at Untrusted pointer dereference in Windows Security Support Provider Interface allows an authorized attacker to elevate privileges locally.

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-2026-85920 [HIGH] CWE-367 CVE-2026-85920: Time-of-check time-of-use (toctou) race condition in Windows BitLocker allows an authorized attacker Time-of-check time-of-use (toctou) race condition in Windows BitLocker allows an authorized attacker to elevate privileges locally.

CVE-2026-88160 [HIGH] CWE-362 CVE-2026-88160: Concurrent execution using shared resource with improper synchronization ('race condition') in Micro Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

CVE-2026-50492 [MEDIUM] CWE-122 CVE-2026-50492: Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an unauthorized attacker t Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an unauthorized attacker to execute code with a physical attack.

CVE-2026-69902 [MEDIUM] CWE-822 CVE-2026-69902: Untrusted pointer dereference in Windows NTFS allows an authorized attacker to execute code locally. Untrusted pointer dereference in Windows NTFS allows an authorized attacker to execute code locally.