Microsoft Windows 11 23H2 vulnerabilities

CVE-2026-33099 [HIGH] CWE-416 CVE-2026-33099: Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to ele Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2026-33100 [HIGH] CWE-416 CVE-2026-33100: Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to ele Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2025-59193 [HIGH] CWE-362 CVE-2025-59193: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

CVE-2026-26169 [MEDIUM] CWE-126 CVE-2026-26169: Buffer over-read in Windows Kernel Memory allows an authorized attacker to disclose information loca Buffer over-read in Windows Kernel Memory allows an authorized attacker to disclose information locally.

CVE-2026-48572 [HIGH] CWE-362 CVE-2026-48572: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows App Installer allows an authorized attacker to elevate privileges locally.

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-2026-34334 [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-2025-50172 [MEDIUM] CWE-770 CVE-2025-50172: Allocation of resources without limits or throttling in Windows DirectX allows an authorized attacke Allocation of resources without limits or throttling in Windows DirectX allows an authorized attacker to deny service over a network.

CVE-2025-24996 [MEDIUM] CWE-73 CVE-2025-24996: External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spo External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.

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-2024-20661 [HIGH] CWE-476 CVE-2024-20661: Microsoft Message Queuing (MSMQ) Denial of Service Vulnerability Microsoft Message Queuing (MSMQ) Denial of Service Vulnerability

CVE-2025-21276 [HIGH] CWE-191 CVE-2025-21276: Windows MapUrlToZone Denial of Service Vulnerability Windows MapUrlToZone Denial of Service Vulnerability

CVE-2025-21207 [HIGH] CWE-400 CVE-2025-21207: Windows Connected Devices Platform Service (Cdpsvc) Denial of Service Vulnerability Windows Connected Devices Platform Service (Cdpsvc) Denial of Service Vulnerability

CVE-2024-21302 [MEDIUM] CWE-284 CVE-2024-21302: Summary: As of July 8, 2025 Microsoft has completed mitigations to address this vulnerability. See K Summary: As of July 8, 2025 Microsoft has completed mitigations to address this vulnerability. See KB5042562: Guidance for blocking rollback of virtualization-based security related updates and the Recommended Actions section of this CVE for guidance on how to protect your systems from this vulnerability. An elevation of privilege vulnerability exis

CVE-2025-59208 [HIGH] CWE-125 CVE-2025-59208: Out-of-bounds read in Windows MapUrlToZone allows an unauthorized attacker to disclose information o Out-of-bounds read in Windows MapUrlToZone allows an unauthorized attacker to disclose information over a network.

CVE-2025-48819 [HIGH] CWE-591 CVE-2025-48819: Sensitive data storage in improperly locked memory in Windows Universal Plug and Play (UPnP) Device Sensitive data storage in improperly locked memory in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to elevate privileges over an adjacent network.

CVE-2025-53139 [HIGH] CWE-319 CVE-2025-53139: Cleartext transmission of sensitive information in Windows Hello allows an unauthorized attacker to Cleartext transmission of sensitive information in Windows Hello allows an unauthorized attacker to bypass a security feature locally.