Microsoft Windows 11 Version 23H2 vulnerabilities

CVE-2026-20929 [HIGH] CWE-284 CVE-2026-20929: Improper access control in Windows HTTP.sys allows an authorized attacker to elevate privileges over Improper access control in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network.

CVE-2024-30085 [HIGH] CWE-122 CVE-2024-30085: Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability

CVE-2025-50154 [MEDIUM] CWE-200 CVE-2025-50154: Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an unauth Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an unauthorized attacker to perform spoofing over a network.

CVE-2025-47981 [CRITICAL] CWE-122 CVE-2025-47981: Heap-based buffer overflow in Windows SPNEGO Extended Negotiation allows an unauthorized attacker to Heap-based buffer overflow in Windows SPNEGO Extended Negotiation allows an unauthorized attacker to execute code over a network.

CVE-2025-47987 [HIGH] CWE-122 CVE-2025-47987: Heap-based buffer overflow in Windows Cred SSProvider Protocol allows an authorized attacker to elev Heap-based buffer overflow in Windows Cred SSProvider Protocol allows an authorized attacker to elevate privileges locally.

CVE-2026-47291 [CRITICAL] CWE-122 CVE-2026-47291: Integer overflow or wraparound in Windows HTTP.sys allows an unauthorized attacker to execute code o Integer overflow or wraparound in Windows HTTP.sys allows an unauthorized attacker to execute code over a network.

CVE-2025-54918 [HIGH] CWE-287 CVE-2025-54918: Improper authentication in Windows NTLM allows an authorized attacker to elevate privileges over a n Improper authentication in Windows NTLM allows an authorized attacker to elevate privileges over a network.

CVE-2025-55234 [CRITICAL] CWE-287 CVE-2025-55234: SMB Server might be susceptible to relay attacks depending on the configuration. An attacker who suc SMB Server might be susceptible to relay attacks depending on the configuration. An attacker who successfully exploited these vulnerabilities could perform relay attacks and make the users subject to elevation of privilege attacks. The SMB Server already supports mechanisms for hardening against relay attacks: SMB Server signing SMB Server Extend

CVE-2023-36397 [CRITICAL] CWE-126 CVE-2023-36397: Windows Pragmatic General Multicast (PGM) Remote Code Execution Vulnerability Windows Pragmatic General Multicast (PGM) Remote Code Execution Vulnerability

CVE-2026-21244 [HIGH] CWE-122 CVE-2026-21244: Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally. Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.

CVE-2026-21248 [HIGH] CWE-122 CVE-2026-21248: Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally. Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.

CVE-2026-45657 [CRITICAL] CWE-122 CVE-2026-45657: Use after free in Windows Kernel allows an unauthorized attacker to execute code over a network. Use after free in Windows Kernel allows an unauthorized attacker to execute code over a network.

CVE-2025-59254 [HIGH] CWE-122 CVE-2025-59254: Heap-based buffer overflow in Windows DWM Core Library allows an authorized attacker to elevate priv Heap-based buffer overflow in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

CVE-2024-38144 [HIGH] CWE-190 CVE-2024-38144: Kernel Streaming WOW Thunk Service Driver Elevation of Privilege Vulnerability Kernel Streaming WOW Thunk Service Driver Elevation of Privilege Vulnerability

CVE-2026-49160 [HIGH] CWE-400 CVE-2026-49160: Uncontrolled resource consumption in HTTP/2 allows an unauthorized attacker to deny service over a n Uncontrolled resource consumption in HTTP/2 allows an unauthorized attacker to deny service over a network.

CVE-2025-49683 [HIGH] CWE-122 CVE-2025-49683: Integer overflow or wraparound in Virtual Hard Disk (VHDX) allows an unauthorized attacker to execut Integer overflow or wraparound in Virtual Hard Disk (VHDX) allows an unauthorized attacker to execute code locally.

CVE-2024-38060 [HIGH] CWE-122 CVE-2024-38060: Windows Imaging Component Remote Code Execution Vulnerability Windows Imaging Component Remote Code Execution Vulnerability

CVE-2025-29971 [HIGH] CWE-125 CVE-2025-29971: Out-of-bounds read in Web Threat Defense (WTD.sys) allows an unauthorized attacker to deny service o Out-of-bounds read in Web Threat Defense (WTD.sys) allows an unauthorized attacker to deny service over a network.

CVE-2024-20697 [HIGH] CWE-122 CVE-2024-20697: Windows libarchive Remote Code Execution Vulnerability Windows libarchive Remote Code Execution Vulnerability

CVE-2024-21357 [HIGH] CWE-843 CVE-2024-21357: Windows Pragmatic General Multicast (PGM) Remote Code Execution Vulnerability Windows Pragmatic General Multicast (PGM) Remote Code Execution Vulnerability