Microsoft Windows 10 21H2 vulnerabilities

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-2023-35380 [HIGH] CWE-416 CVE-2023-35380: Windows Kernel Elevation of Privilege Vulnerability Windows Kernel Elevation of Privilege Vulnerability

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-2023-21812 [HIGH] CWE-122 CVE-2023-21812: Windows Common Log File System Driver Elevation of Privilege Vulnerability Windows Common Log File System Driver Elevation of Privilege Vulnerability

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-2023-35364 [HIGH] CWE-190 CVE-2023-35364: Windows Kernel Elevation of Privilege Vulnerability Windows Kernel 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.

CVE-2024-38062 [HIGH] CWE-125 CVE-2024-38062: Windows Kernel-Mode Driver Elevation of Privilege Vulnerability Windows Kernel-Mode Driver Elevation of Privilege Vulnerability

CVE-2025-26641 [HIGH] CWE-400 CVE-2025-26641: Uncontrolled resource consumption in Windows Cryptographic Services allows an unauthorized attacker Uncontrolled resource consumption in Windows Cryptographic Services allows an unauthorized attacker to deny service over a network.

CVE-2023-1017 [HIGH] CWE-787 CVE-2023-1017: An out-of-bounds write vulnerability exists in TPM2.0's Module Library allowing writing of a 2-byte An out-of-bounds write vulnerability exists in TPM2.0's Module Library allowing writing of a 2-byte data past the end of TPM2.0 command in the CryptParameterDecryption routine. An attacker who can successfully exploit this vulnerability can lead to denial of service (crashing the TPM chip/process or rendering it unusable) and/or arbitrary code execution

CVE-2025-32714 [HIGH] CWE-284 CVE-2025-32714: Improper access control in Windows Installer allows an authorized attacker to elevate privileges loc Improper access control in Windows Installer allows an authorized attacker to elevate privileges locally.

CVE-2025-48799 [HIGH] CWE-59 CVE-2025-48799: Improper link resolution before file access ('link following') in Windows Update Service allows an a Improper link resolution before file access ('link following') in Windows Update Service allows an authorized attacker to elevate privileges locally.