Microsoft Windows 11 23H2 vulnerabilities

CVE-2026-42991 [HIGH] CWE-362 CVE-2026-42991: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.

CVE-2026-26168 [HIGH] CWE-362 CVE-2026-26168: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2026-62782 [HIGH] CWE-125 CVE-2026-62782: Out-of-bounds read in Windows SMB Client allows an unauthorized attacker to disclose information ove Out-of-bounds read in Windows SMB Client allows an unauthorized attacker to disclose information over a network.

CVE-2026-85797 [HIGH] CWE-20 CVE-2026-85797: Out-of-bounds read in Windows GDI allows an unauthorized attacker to disclose information over a net Out-of-bounds read in Windows GDI allows an unauthorized attacker to disclose information over a network.

CVE-2026-45639 [HIGH] CWE-125 CVE-2026-45639: 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-2026-42908 [HIGH] CWE-125 CVE-2026-42908: 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-2025-55326 [HIGH] CWE-416 CVE-2025-55326: Use after free in Connected Devices Platform Service (Cdpsvc) allows an unauthorized attacker to exe Use after free in Connected Devices Platform Service (Cdpsvc) allows an unauthorized attacker to execute code over a network.

CVE-2025-27484 [HIGH] CWE-591 CVE-2025-27484: 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 a network.

CVE-2026-20844 [HIGH] CWE-362 CVE-2026-20844: Use after free in Windows Clipboard Server allows an unauthorized attacker to elevate privileges loc Use after free in Windows Clipboard Server allows an unauthorized attacker to elevate privileges locally.

CVE-2026-32156 [HIGH] CWE-416 CVE-2026-32156: 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 execute code locally.

CVE-2026-69340 [HIGH] CWE-122 CVE-2026-69340: Heap-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges over Heap-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges over a network.

CVE-2024-30035 [HIGH] CWE-416 CVE-2024-30035: Windows DWM Core Library Elevation of Privilege Vulnerability Windows DWM Core Library Elevation of Privilege Vulnerability

CVE-2026-35422 [MEDIUM] CWE-288 CVE-2026-35422: Authentication bypass using an alternate path or channel in Windows TCP/IP allows an authorized atta Authentication bypass using an alternate path or channel in Windows TCP/IP allows an authorized attacker to bypass a security feature over a network.

CVE-2024-38147 [HIGH] CWE-416 CVE-2024-38147: Microsoft DWM Core Library Elevation of Privilege Vulnerability Microsoft DWM Core Library Elevation of Privilege Vulnerability

CVE-2025-21370 [HIGH] CWE-20 CVE-2025-21370: Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability

CVE-2025-48822 [HIGH] CWE-125 CVE-2025-48822: Out-of-bounds read in Windows Hyper-V allows an unauthorized attacker to execute code locally. Out-of-bounds read in Windows Hyper-V allows an unauthorized attacker to execute code locally.

CVE-2025-26678 [HIGH] CWE-284 CVE-2025-26678: Improper access control in Windows Defender Application Control (WDAC) allows an unauthorized attack Improper access control in Windows Defender Application Control (WDAC) allows an unauthorized attacker to bypass a security feature locally.

CVE-2023-36425 [HIGH] CWE-122 CVE-2023-36425: Windows Distributed File System (DFS) Remote Code Execution Vulnerability Windows Distributed File System (DFS) Remote Code Execution Vulnerability

CVE-2025-33067 [HIGH] CWE-269 CVE-2025-33067: Improper privilege management in Windows Kernel allows an unauthorized attacker to elevate privilege Improper privilege management in Windows Kernel allows an unauthorized attacker to elevate privileges locally.

CVE-2026-83845 [HIGH] CWE-290 CVE-2026-83845: Improper privilege management in Windows Internet (wininet.dll) allows an authorized attacker to per Improper privilege management in Windows Internet (wininet.dll) allows an authorized attacker to perform spoofing locally.