Microsoft Windows 10 21H2 vulnerabilities

CVE-2026-56174 [HIGH] CWE-426 CVE-2026-56174: Untrusted search path in Windows Narrator Braille allows an authorized attacker to elevate privilege Untrusted search path in Windows Narrator Braille allows an authorized attacker to elevate privileges locally.

CVE-2025-59201 [HIGH] CWE-284 CVE-2025-59201: Improper access control in Network Connection Status Indicator (NCSI) allows an authorized attacker Improper access control in Network Connection Status Indicator (NCSI) allows an authorized attacker to elevate privileges locally.

CVE-2025-53152 [HIGH] CWE-416 CVE-2025-53152: Use after free in Desktop Windows Manager allows an authorized attacker to execute code locally. Use after free in Desktop Windows Manager allows an authorized attacker to execute code locally.

CVE-2025-50153 [HIGH] CWE-416 CVE-2025-50153: Use after free in Desktop Windows Manager allows an authorized attacker to elevate privileges locall Use after free in Desktop Windows Manager allows an authorized attacker to elevate privileges locally.

CVE-2025-49761 [HIGH] CWE-416 CVE-2025-49761: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally. Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2025-53151 [HIGH] CWE-416 CVE-2025-53151: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally. Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-69881 [HIGH] CWE-476 CVE-2026-69881: Null pointer dereference in Windows IKE Extension allows an unauthorized attacker to deny service ov Null pointer dereference in Windows IKE Extension allows an unauthorized attacker to deny service over a network.

CVE-2026-84001 [HIGH] CWE-125 CVE-2026-84001: Out-of-bounds read in Windows Key Distribution Center allows an unauthorized attacker to deny servic Out-of-bounds read in Windows Key Distribution Center allows an unauthorized attacker to deny service over a network.

CVE-2026-83989 [HIGH] CWE-125 CVE-2026-83989: Out-of-bounds read in Windows Services for NFS ONCRPC XDR Driver allows an unauthorized attacker to Out-of-bounds read in Windows Services for NFS ONCRPC XDR Driver allows an unauthorized attacker to deny service over a network.

CVE-2026-49787 [HIGH] CWE-770 CVE-2026-49787: Allocation of resources without limits or throttling in Windows HTTP.sys allows an unauthorized atta Allocation of resources without limits or throttling in Windows HTTP.sys allows an unauthorized attacker to deny service over a network.

CVE-2026-50496 [HIGH] CWE-125 CVE-2026-50496: Out-of-bounds read in Windows Network Policy Server SNMP allows an unauthorized attacker to disclose Out-of-bounds read in Windows Network Policy Server SNMP allows an unauthorized attacker to disclose information over a network.

CVE-2026-54119 [HIGH] CWE-835 CVE-2026-54119: Loop with unreachable exit condition ('infinite loop') in Windows Active Directory allows an unautho Loop with unreachable exit condition ('infinite loop') in Windows Active Directory allows an unauthorized attacker to deny service over a network.

CVE-2025-49675 [HIGH] CWE-416 CVE-2025-49675: Use after free in Kernel Streaming WOW Thunk Service Driver allows an authorized attacker to elevate Use after free in Kernel Streaming WOW Thunk Service Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-88118 [HIGH] CWE-122 CVE-2026-88118: Integer overflow or wraparound in Windows Background Intelligent Transfer Service (BITS) allows an a Integer overflow or wraparound in Windows Background Intelligent Transfer Service (BITS) allows an authorized attacker to elevate privileges locally.

CVE-2026-23673 [HIGH] CWE-125 CVE-2026-23673: Out-of-bounds read in Windows Resilient File System (ReFS) allows an authorized attacker to elevate Out-of-bounds read in Windows Resilient File System (ReFS) allows an authorized attacker to elevate privileges locally.

CVE-2025-62571 [HIGH] CWE-20 CVE-2025-62571: Improper input validation in Windows Installer allows an authorized attacker to elevate privileges l Improper input validation in Windows Installer allows an authorized attacker to elevate privileges locally.

CVE-2026-33838 [HIGH] CWE-415 CVE-2026-33838: Double free in Windows Message Queuing allows an authorized attacker to elevate privileges locally. Double free in Windows Message Queuing 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-2026-20822 [HIGH] CWE-416 CVE-2026-20822: Use after free in Microsoft Graphics Component allows an authorized attacker to elevate privileges l Use after free in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally.

CVE-2026-83877 [HIGH] CWE-190 CVE-2026-83877: Integer overflow or wraparound in HID Parser Library allows an authorized attacker to elevate privil Integer overflow or wraparound in HID Parser Library allows an authorized attacker to elevate privileges locally.