Microsoft Windows 11 26H1 vulnerabilities

CVE-2026-50647 [HIGH] CWE-835 CVE-2026-50647: Loop with unreachable exit condition ('infinite loop') in Active Directory Federation Services (AD F Loop with unreachable exit condition ('infinite loop') in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.

CVE-2026-83506 [HIGH] CWE-426 CVE-2026-83506: Untrusted search path in Servicing Stack Updates allows an authorized attacker to elevate privileges Untrusted search path in Servicing Stack Updates allows an authorized attacker to elevate privileges locally.

CVE-2026-50377 [HIGH] CWE-125 CVE-2026-50377: Out-of-bounds read in Windows Kernel allows an authorized attacker to elevate privileges locally. Out-of-bounds read in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-25176 [HIGH] CWE-284 CVE-2026-25176: Improper access control in Windows Ancillary Function Driver for WinSock allows an authorized attack Improper access control in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2026-88072 [HIGH] CWE-59 CVE-2026-88072: Improper access control in Windows Host Guardian Service allows an authorized attacker to elevate pr Improper access control in Windows Host Guardian Service allows an authorized attacker to elevate privileges locally.

CVE-2026-83508 [HIGH] CWE-125 CVE-2026-83508: Out-of-bounds read in Windows NTFS allows an authorized attacker to elevate privileges locally. Out-of-bounds read in Windows NTFS allows an authorized attacker to elevate privileges locally.

CVE-2026-70064 [HIGH] CWE-191 CVE-2026-70064: Integer underflow (wrap or wraparound) in Windows Kerberos allows an authorized attacker to elevate Integer underflow (wrap or wraparound) in Windows Kerberos allows an authorized attacker to elevate privileges locally.

CVE-2026-83567 [HIGH] CWE-125 CVE-2026-83567: Out-of-bounds read in Windows NTFS allows an authorized attacker to elevate privileges locally. Out-of-bounds read in Windows NTFS allows an authorized attacker to elevate privileges locally.

CVE-2026-70113 [HIGH] CWE-190 CVE-2026-70113: Integer overflow or wraparound in Windows Client for NFS allows an authorized attacker to elevate pr Integer overflow or wraparound in Windows Client for NFS allows an authorized attacker to elevate privileges locally.

CVE-2026-69942 [HIGH] CWE-126 CVE-2026-69942: Buffer over-read in Windows Overlay Filter allows an authorized attacker to execute code locally. Buffer over-read in Windows Overlay Filter allows an authorized attacker to execute code locally.

CVE-2026-69953 [HIGH] CWE-126 CVE-2026-69953: Buffer over-read in Windows Overlay Filter allows an authorized attacker to elevate privileges local Buffer over-read in Windows Overlay Filter allows an authorized attacker to elevate privileges locally.

CVE-2026-69959 [HIGH] CWE-125 CVE-2026-69959: Out-of-bounds read in Windows Overlay Filter allows an authorized attacker to execute code locally. Out-of-bounds read in Windows Overlay Filter allows an authorized attacker to execute code locally.

CVE-2026-70008 [HIGH] CWE-190 CVE-2026-70008: Integer overflow or wraparound in Windows IP Over USB Service allows an authorized attacker to eleva Integer overflow or wraparound in Windows IP Over USB Service allows an authorized attacker to elevate privileges locally.

CVE-2026-69950 [HIGH] CWE-126 CVE-2026-69950: Buffer over-read in Windows Overlay Filter allows an authorized attacker to elevate privileges local Buffer over-read in Windows Overlay Filter allows an authorized attacker to elevate privileges locally.

CVE-2026-58613 [HIGH] CWE-416 CVE-2026-58613: Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate pr Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-88191 [HIGH] CWE-59 CVE-2026-88191: Improper link resolution before file access ('link following') in Microsoft Windows Search Component Improper link resolution before file access ('link following') in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

CVE-2026-69612 [HIGH] CWE-36 CVE-2026-69612: Absolute path traversal in Windows Error Reporting allows an authorized attacker to elevate privileg Absolute path traversal in Windows Error Reporting allows an authorized attacker to elevate privileges locally.

CVE-2026-69445 [HIGH] CWE-22 CVE-2026-69445: Improper limitation of a pathname to a restricted directory ('path traversal') in Windows Compressed Improper limitation of a pathname to a restricted directory ('path traversal') in Windows Compressed Folder allows an authorized attacker to elevate privileges locally.

CVE-2026-62832 [HIGH] CWE-59 CVE-2026-62832: Improper link resolution before file access ('link following') in Windows User Profile Service allow Improper link resolution before file access ('link following') in Windows User Profile Service allows an authorized attacker to elevate privileges locally.

CVE-2026-102201 [HIGH] CWE-416 CVE-2026-102201: Use after free in Microsoft Windows Media Foundation allows an authorized attacker to elevate privil Use after free in Microsoft Windows Media Foundation allows an authorized attacker to elevate privileges locally.