Microsoft Windows 11 Version 26H1 vulnerabilities

CVE-2026-32068 [HIGH] CWE-362 CVE-2026-32068: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SSDP Service allows an authorized attacker to elevate privileges locally.

CVE-2026-34337 [HIGH] CWE-362 CVE-2026-34337: 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 locally.

CVE-2026-32091 [HIGH] CWE-362 CVE-2026-32091: Concurrent execution using shared resource with improper synchronization ('race condition') in Micro Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Brokering File System allows an unauthorized attacker to elevate privileges locally.

CVE-2026-50440 [HIGH] CWE-362 CVE-2026-50440: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Audio Service allows an authorized attacker to elevate privileges locally.

CVE-2026-50321 [HIGH] CWE-362 CVE-2026-50321: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows USB Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-34334 [HIGH] CWE-362 CVE-2026-34334: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.

CVE-2026-49803 [HIGH] CWE-362 CVE-2026-49803: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows AppX Deployment Service allows an authorized attacker to elevate privileges locally.

CVE-2026-49183 [HIGH] CWE-362 CVE-2026-49183: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Clipboard Server allows an authorized attacker to elevate privileges locally.

CVE-2026-50384 [HIGH] CWE-362 CVE-2026-50384: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Clip Service allows an authorized attacker to elevate privileges locally.

CVE-2026-50403 [HIGH] CWE-362 CVE-2026-50403: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an authorized attacker to elevate privileges locally.

CVE-2026-50669 [HIGH] CWE-362 CVE-2026-50669: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Telephony Service allows an authorized attacker to elevate privileges locally.

CVE-2026-32223 [MEDIUM] CWE-122 CVE-2026-32223: Heap-based buffer overflow in Windows USB Print Driver allows an unauthorized attacker to elevate pr Heap-based buffer overflow in Windows USB Print Driver allows an unauthorized attacker to elevate privileges with a physical attack.

CVE-2026-42903 [MEDIUM] CWE-476 CVE-2026-42903: Null pointer dereference in Windows Kerberos allows an authorized attacker to deny service over a ne Null pointer dereference in Windows Kerberos allows an authorized attacker to deny service over a network.

CVE-2026-26155 [MEDIUM] CWE-126 CVE-2026-26155: Microsoft Local Security Authority Subsystem Service Information Disclosure Vulnerability Microsoft Local Security Authority Subsystem Service Information Disclosure Vulnerability

CVE-2026-49799 [MEDIUM] CWE-400 CVE-2026-49799: Uncontrolled resource consumption in Windows Local Security Authority Subsystem Service (LSASS) allo Uncontrolled resource consumption in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to deny service over a network.

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-2026-45585 [MEDIUM] CWE-77 CVE-2026-45585: Microsoft is aware of a security feature bypass vulnerability in Windows publicly referred to as &qu Microsoft is aware of a security feature bypass vulnerability in Windows publicly referred to as "YellowKey". The proof of concept for this vulnerability has been made public violating coordinated vulnerability best practices. We are issuing this CVE to provide mitigation guidance that can be implemented to protect against this vulnerability until th

CVE-2026-55144 [HIGH] CWE-325 CVE-2026-55144: Missing cryptographic step in Windows CryptoAPI allows an authorized attacker to perform tampering l Missing cryptographic step in Windows CryptoAPI allows an authorized attacker to perform tampering 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-2026-50297 [HIGH] CWE-284 CVE-2026-50297: Improper access control in Windows Win32K allows an authorized attacker to elevate privileges locall Improper access control in Windows Win32K allows an authorized attacker to elevate privileges locally.