Microsoft Windows 11 Version 26H1 vulnerabilities

CVE-2026-32202 [MEDIUM] CWE-693 CVE-2026-32202: Protection mechanism failure in Windows Shell allows an unauthorized attacker to perform spoofing ov Protection mechanism failure in Windows Shell allows an unauthorized attacker to perform spoofing over a network.

CVE-2026-21510 [HIGH] CWE-693 CVE-2026-21510: Protection mechanism failure in Windows Shell allows an unauthorized attacker to bypass a security f Protection mechanism failure in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.

CVE-2026-21513 [HIGH] CWE-693 CVE-2026-21513: Protection mechanism failure in MSHTML Framework allows an unauthorized attacker to bypass a securit Protection mechanism failure in MSHTML Framework allows an unauthorized attacker to bypass a security feature over a network.

CVE-2026-21533 [HIGH] CWE-269 CVE-2026-21533: Improper privilege management in Windows Remote Desktop allows an authorized attacker to elevate pri Improper privilege management in Windows Remote Desktop allows an authorized attacker to elevate privileges locally.

CVE-2026-21519 [HIGH] CWE-843 CVE-2026-21519: Access of resource using incompatible type ('type confusion') in Desktop Window Manager allows an au Access of resource using incompatible type ('type confusion') in Desktop Window Manager allows an authorized attacker to elevate privileges locally.

CVE-2026-21525 [MEDIUM] CWE-476 CVE-2026-21525: Null pointer dereference in Windows Remote Access Connection Manager allows an unauthorized attacker Null pointer dereference in Windows Remote Access Connection Manager allows an unauthorized attacker to deny service locally.

CVE-2020-17103 [HIGH] CWE-269 CVE-2020-17103: Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability

CVE-2026-25187 [HIGH] CWE-59 CVE-2026-25187: Improper link resolution before file access ('link following') in Winlogon allows an authorized atta Improper link resolution before file access ('link following') in Winlogon allows an authorized attacker to elevate privileges locally.

CVE-2026-45586 [HIGH] CWE-59 CVE-2026-45586: Improper link resolution before file access ('link following') in Windows Collaborative Translation Improper link resolution before file access ('link following') in Windows Collaborative Translation Framework allows an authorized attacker to elevate privileges locally.

CVE-2026-33824 [CRITICAL] CWE-415 CVE-2026-33824: Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network. Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.

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-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-2026-21250 [HIGH] CWE-822 CVE-2026-21250: Untrusted pointer dereference in Windows HTTP.sys allows an authorized attacker to elevate privilege Untrusted pointer dereference in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.

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-2026-41096 [CRITICAL] CWE-122 CVE-2026-41096: Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network.

CVE-2026-50330 [CRITICAL] CWE-122 CVE-2026-50330: Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to elevate privi Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to elevate privileges over a network.

CVE-2026-44815 [CRITICAL] CWE-121 CVE-2026-44815: Stack-based buffer overflow in Windows DHCP Client allows an unauthorized attacker to execute code o Stack-based buffer overflow in Windows DHCP Client allows an unauthorized attacker to execute code over a network.

CVE-2026-50439 [CRITICAL] CWE-416 CVE-2026-50439: Use after free in Microsoft Message Queuing Queue Manager allows an unauthorized attacker to execute Use after free in Microsoft Message Queuing Queue Manager allows an unauthorized attacker to execute code over a network.