CVE-2026-20831
Published Jan 13, 2026Time-of-check time-of-use (toctou) race condition in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
- evidence mentions
- 1
- Buzz score
- 11.9
Vendor/product archive
4,453 CVEs tagged to microsoft / windows_server_2012 — 196 Critical, 2,954 High, 1,243 Medium, 60 Low, 0 Unrated.
Time-of-check time-of-use (toctou) race condition in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Out-of-bounds read in Windows Internet Connection Sharing (ICS) allows an unauthorized attacker to disclose information with a physical attack.
Protection mechanism failure in Windows Remote Assistance allows an unauthorized attacker to bypass a security feature locally.
Exposure of sensitive information to an unauthorized actor in Windows Remote Procedure Call allows an unauthorized attacker to disclose information locally.
Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
Time-of-check time-of-use (toctou) race condition in Windows Installer allows an authorized attacker to elevate privileges locally.
Time-of-check time-of-use (toctou) race condition in Windows Kernel Memory allows an authorized attacker to elevate privileges locally.
Exposure of sensitive information to an unauthorized actor in Desktop Windows Manager allows an authorized attacker to disclose information locally.
Improper access control in Windows Deployment Services allows an unauthorized attacker to execute code over an adjacent network.
Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.
Improper input validation in Windows Installer allows an authorized attacker to elevate privileges locally.
Integer underflow (wrap or wraparound) in Windows Hyper-V allows an authorized attacker to deny service over a network.
Untrusted pointer dereference in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.
Improper access control in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges locally.
Buffer over-read in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to disclose information over a network.
Use of uninitialized resource in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
Null pointer dereference in Windows Client-Side Caching (CSC) Service allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.
Improper input validation in Windows Message Queuing allows an authorized attacker to elevate privileges locally.
Improper neutralization of special elements used in a command ('command injection') in Windows PowerShell allows an unauthorized attacker to execute code locally.
Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to execute code over a network.
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to eleva…
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code over a network.