Microsoft · Windows Ancillary Function Driver for WinSock
Updated August 12, 2026
A use-after-free vulnerability in the Microsoft Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally. This vulnerability is significant as it could allow an attacker to gain elevated access to sensitive data and systems. Microsoft has released patches to address this issue.
If exploited, this vulnerability could allow an attacker to gain elevated privileges, potentially leading to unauthorized access to sensitive data and systems. This could result in significant financial losses and reputational damage.
Apply the latest Microsoft security patches to affected systems as soon as possible to prevent exploitation. Ensure that all Windows devices are running the latest software versions.