Microsoft · Windows Ancillary Function Driver for WinSock
Updated August 17, 2026
A use-after-free vulnerability in Microsoft Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally. This vulnerability is concerning because it can be used by an attacker to gain elevated access to sensitive information and systems. The vulnerability's impact is increased due to its potential for lateral movement within a network.
If exploited, this vulnerability could allow an attacker to gain elevated privileges, potentially leading to unauthorized access to sensitive information and systems. This could result in significant financial losses and reputational damage.
Apply the latest security patch from Microsoft to mitigate this vulnerability. Ensure that all affected systems are updated as soon as possible to prevent potential attacks.
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