Microsoft Windows 11 26H1 vulnerabilities

CVE-2026-69423 [HIGH] CWE-122 CVE-2026-69423: Heap-based buffer overflow in Windows USB Video Driver allows an authorized attacker to elevate priv Heap-based buffer overflow in Windows USB Video Driver allows an authorized attacker to elevate privileges over a network.

CVE-2026-69539 [HIGH] CWE-416 CVE-2026-69539: 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-2026-69852 [HIGH] CWE-122 CVE-2026-69852: Remote Code Execution in Windows Routing and Remote Access Service (RRAS) allows attacker to gain an Remote Code Execution in Windows Routing and Remote Access Service (RRAS) allows attacker to gain an unauthorized access to victim's machine

CVE-2026-69599 [HIGH] CWE-416 CVE-2026-69599: 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-2026-58608 [HIGH] CWE-362 CVE-2026-58608: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Print Spooler Components allows an authorized attacker to execute code over a network.

CVE-2026-49798 [CRITICAL] CWE-416 CVE-2026-49798: Use after free in Windows Kernel allows an unauthorized attacker to elevate privileges locally. Use after free in Windows Kernel allows an unauthorized attacker to elevate privileges locally.

CVE-2026-50509 [HIGH] CWE-502 CVE-2026-50509: Deserialization of untrusted data in Windows Wireless Wide Area Network Service allows an authorized Deserialization of untrusted data in Windows Wireless Wide Area Network Service allows an authorized attacker to elevate privileges locally.

CVE-2026-83797 [HIGH] CWE-125 CVE-2026-83797: Out-of-bounds read in Windows Partition Management Driver allows an unauthorized attacker to execute Out-of-bounds read in Windows Partition Management Driver allows an unauthorized attacker to execute code over a network.

CVE-2026-69494 [HIGH] CWE-122 CVE-2026-69494: Out-of-bounds read in Windows Event Logging Service allows an unauthorized attacker to execute code Out-of-bounds read in Windows Event Logging Service allows an unauthorized attacker to execute code over a network.

CVE-2026-69598 [HIGH] CWE-131 CVE-2026-69598: Incorrect calculation of buffer size in Windows iSCSI allows an unauthorized attacker to execute cod Incorrect calculation of buffer size in Windows iSCSI allows an unauthorized attacker to execute code over a network.

CVE-2026-42989 [HIGH] CWE-59 CVE-2026-42989: 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-2026-70111 [HIGH] CWE-822 CVE-2026-70111: Untrusted pointer dereference in Windows Kernel allows an unauthorized attacker to elevate privilege Untrusted pointer dereference in Windows Kernel allows an unauthorized attacker to elevate privileges over a network.

CVE-2026-70342 [HIGH] CWE-416 CVE-2026-70342: Use after free in Windows Ancillary Function Driver for WinSock allows an unauthorized attacker to e Use after free in Windows Ancillary Function Driver for WinSock allows an unauthorized attacker to elevate privileges over a network.

CVE-2026-42900 [HIGH] CWE-362 CVE-2026-42900: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows App Store allows an unauthorized attacker to elevate privileges over a network.

CVE-2026-69462 [HIGH] CWE-122 CVE-2026-69462: Heap-based buffer overflow in Windows Error Reporting allows an authorized attacker to elevate privi Heap-based buffer overflow in Windows Error Reporting allows an authorized attacker to elevate privileges over a network.

CVE-2026-68894 [HIGH] CWE-122 CVE-2026-68894: Heap-based buffer overflow in Windows Error Reporting allows an authorized attacker to elevate privi Heap-based buffer overflow in Windows Error Reporting allows an authorized attacker to elevate privileges over a network.

CVE-2026-68876 [HIGH] CWE-122 CVE-2026-68876: Heap-based buffer overflow in Windows Program Compatibility Assistant Service allows an authorized a Heap-based buffer overflow in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges over a network.

CVE-2026-69271 [HIGH] CWE-122 CVE-2026-69271: Heap-based buffer overflow in Microsoft Standard XPS allows an authorized attacker to elevate privil Heap-based buffer overflow in Microsoft Standard XPS allows an authorized attacker to elevate privileges over a network.

CVE-2026-69363 [HIGH] CWE-122 CVE-2026-69363: Heap-based buffer overflow in Windows Error Reporting allows an authorized attacker to elevate privi Heap-based buffer overflow in Windows Error Reporting allows an authorized attacker to elevate privileges over a network.

CVE-2026-50452 [HIGH] CWE-362 CVE-2026-50452: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an unauthorized attacker to elevate privileges over a network.