CVE-2025-21418

Summary

CVE-2025-21418 is a newly disclosed vulnerability affecting the Windows Ancillary Function Driver for WinSock. This issue grants attackers the ability to elevate their privileges, allowing them to access higher levels of system functionality and potentially install malware or make unauthorized changes to the system. Successful exploitation requires the attacker to have a local presence on the target machine, such as through a malicious software installation or a phishing email attachment. Microsoft has released a security update to address this vulnerability, and it is strongly recommended that all Windows users apply the patch as soon as possible to protect against potential attacks.

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