Microsoft Windows 11 26H1 vulnerabilities

CVE-2026-54984 [HIGH] CWE-122 CVE-2026-54984: Heap-based buffer overflow in Windows Imaging Component allows an unauthorized attacker to execute c Heap-based buffer overflow in Windows Imaging Component allows an unauthorized attacker to execute code locally.

CVE-2026-50347 [HIGH] CWE-122 CVE-2026-50347: Heap-based buffer overflow in Windows Data dll allows an unauthorized attacker to execute code local Heap-based buffer overflow in Windows Data dll allows an unauthorized attacker to execute code locally.

CVE-2026-32152 [HIGH] CWE-416 CVE-2026-32152: Use after free in Desktop Window Manager allows an authorized attacker to elevate privileges locally Use after free in Desktop Window Manager allows an authorized attacker to elevate privileges locally.

CVE-2026-26179 [HIGH] CWE-415 CVE-2026-26179: Double free in Windows Kernel allows an authorized attacker to elevate privileges locally. Double free in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-35424 [HIGH] CWE-401 CVE-2026-35424: Missing release of memory after effective lifetime in Windows Internet Key Exchange (IKE) Protocol a Missing release of memory after effective lifetime in Windows Internet Key Exchange (IKE) Protocol allows an unauthorized attacker to deny service over a network.

CVE-2026-70245 [HIGH] CWE-843 CVE-2026-70245: Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver f Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2026-83840 [HIGH] CWE-1390 CVE-2026-83840: Weak authentication in Windows Error Reporting allows an authorized attacker to elevate privileges l Weak authentication in Windows Error Reporting allows an authorized attacker to elevate privileges locally.

CVE-2026-69809 [HIGH] CWE-401 CVE-2026-69809: Missing release of memory after effective lifetime in Active Directory Domain Services allows an una Missing release of memory after effective lifetime in Active Directory Domain Services allows an unauthorized attacker to deny service over a network.

CVE-2026-69428 [HIGH] CWE-125 CVE-2026-69428: Out-of-bounds read in Windows LDAP - Lightweight Directory Access Protocol allows an unauthorized at Out-of-bounds read in Windows LDAP - Lightweight Directory Access Protocol allows an unauthorized attacker to deny service over a network.

CVE-2026-49788 [HIGH] CWE-770 CVE-2026-49788: Allocation of resources without limits or throttling in HTTP/2 allows an unauthorized attacker to de Allocation of resources without limits or throttling in HTTP/2 allows an unauthorized attacker to deny service over a network.

CVE-2026-44806 [HIGH] CWE-401 CVE-2026-44806: Missing release of memory after effective lifetime in Windows Cryptographic Services allows an unaut Missing release of memory after effective lifetime in Windows Cryptographic Services allows an unauthorized attacker to deny service over a network.

CVE-2026-83761 [HIGH] CWE-416 CVE-2026-83761: Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.

CVE-2026-70303 [HIGH] CWE-787 CVE-2026-70303: Out-of-bounds write in Windows Kernel allows an authorized attacker to elevate privileges locally. Out-of-bounds write in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-45636 [HIGH] CWE-20 CVE-2026-45636: Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.

CVE-2026-26156 [HIGH] CWE-20 CVE-2026-26156: Heap-based buffer overflow in Windows Hyper-V allows an unauthorized attacker to execute code locall Heap-based buffer overflow in Windows Hyper-V allows an unauthorized attacker to execute code locally.

CVE-2026-69926 [HIGH] CWE-843 CVE-2026-69926: 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-2026-69880 [HIGH] CWE-843 CVE-2026-69880: 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-2026-70222 [HIGH] CWE-23 CVE-2026-70222: Relative path traversal in Windows Shell allows an authorized attacker to elevate privileges locally Relative path traversal in Windows Shell allows an authorized attacker to elevate privileges locally.

CVE-2026-83873 [HIGH] CWE-23 CVE-2026-83873: Relative path traversal in Windows Shell allows an authorized attacker to elevate privileges locally Relative path traversal in Windows Shell allows an authorized attacker to elevate privileges locally.

CVE-2026-70225 [HIGH] CWE-843 CVE-2026-70225: Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver f Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.