Microsoft Windows 11 25H2 vulnerabilities

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-2025-60724 [CRITICAL] CWE-122 CVE-2025-60724: Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execut Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code 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.

CVE-2026-56194 [HIGH] CWE-122 CVE-2026-56194: Heap-based buffer overflow in Windows Network File System allows an authorized attacker to elevate p Heap-based buffer overflow in Windows Network File System allows an authorized attacker to elevate privileges over a network.

CVE-2026-56647 [HIGH] CWE-190 CVE-2026-56647: Integer overflow or wraparound in Windows Remote Access Service Infrastructure allows an authorized Integer overflow or wraparound in Windows Remote Access Service Infrastructure allows an authorized attacker to elevate privileges over a network.

CVE-2026-57092 [CRITICAL] CWE-416 CVE-2026-57092: Use after free in Windows VMSwitch allows an authorized attacker to elevate privileges over a networ Use after free in Windows VMSwitch allows an authorized attacker to elevate privileges over a network.

CVE-2026-57090 [CRITICAL] CWE-122 CVE-2026-57090: Heap-based buffer overflow in Microsoft Windows Media Foundation allows an unauthorized attacker to Heap-based buffer overflow in Microsoft Windows Media Foundation allows an unauthorized attacker to execute code over a network.

CVE-2026-49172 [CRITICAL] CWE-122 CVE-2026-49172: Heap-based buffer overflow in Windows FTP Service allows an unauthorized attacker to execute code ov Heap-based buffer overflow in Windows FTP Service allows an unauthorized attacker to execute code over a network.

CVE-2026-54995 [CRITICAL] CWE-416 CVE-2026-54995: Use after free in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to ex Use after free in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over a network.

CVE-2026-50666 [HIGH] CWE-416 CVE-2026-50666: Use after free in Windows Remote Access Connection Manager allows an authorized attacker to elevate Use after free in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges over a network.

CVE-2026-50360 [HIGH] CWE-303 CVE-2026-50360: Incorrect implementation of authentication algorithm in Windows SMB Server allows an authorized atta Incorrect implementation of authentication algorithm in Windows SMB Server allows an authorized attacker to elevate privileges over a network.

CVE-2026-25177 [HIGH] CWE-641 CVE-2026-25177: Improper restriction of names for files and other resources in Active Directory Domain Services allo Improper restriction of names for files and other resources in Active Directory Domain Services allows an authorized attacker to elevate privileges over a network.

CVE-2026-58626 [HIGH] CWE-416 CVE-2026-58626: Use after free in Windows Remote Desktop Services allows an authorized attacker to execute code over Use after free in Windows Remote Desktop Services allows an authorized attacker to execute code over a network.

CVE-2026-50502 [HIGH] CWE-1220 CVE-2026-50502: Insufficient granularity of access control in Windows Event Logging Service allows an authorized att Insufficient granularity of access control in Windows Event Logging Service allows an authorized attacker to execute code over a network.