Common Vulnerabilities and Exposures (CVE)
CVE-2026-21241
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
CVE-2026-21240
Time-of-check time-of-use (toctou) race condition in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.
CVE-2026-21243
Null pointer dereference in Windows LDAP - Lightweight Directory Access Protocol allows an unauthorized attacker to deny service over a network.
CVE-2026-21244
Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.
CVE-2026-21245
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVE-2026-21249
External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing locally.
CVE-2026-21250
Untrusted pointer dereference in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.
CVE-2026-21251
Use after free in Windows Cluster Client Failover allows an authorized attacker to elevate privileges locally.
CVE-2026-21253
Use after free in Mailslot File System allows an authorized attacker to elevate privileges locally.
CVE-2026-21255
Improper access control in Windows Hyper-V allows an authorized attacker to bypass a security feature locally.
CVE-2026-21256
Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio allows an unauthorized attacker to execute code over a network.
CVE-2026-21257
Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio allows an authorized attacker to elevate privileges over a network.
CVE-2026-21261
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
CVE-2026-21508
Improper authentication in Windows Storage allows an authorized attacker to elevate privileges locally.
CVE-2026-21511
Deserialization of untrusted data in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.