CVE-2026-34346
Windows Ancillary Function Driver for WinSock Information Disclosure vulnerability
MSRC advisory July 14, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-34346
- Affected products
- Windows Ancillary Function Driver for WinSock Information Disclosure · Microsoft Windows Ancillary Function Driver for WinSock Information Disclosure · Microsoft
What happened
Cleartext transmission of sensitive information in Windows Ancillary Function Driver for WinSock allows an authorized attacker to disclose information locally.
What it means for your business
Windows Ancillary Function Driver for WinSock Information Disclosure vulnerability (CVE-2026-34346) was added to Microsoft’s security update guidance. Cleartext transmission of sensitive information in Windows Ancillary Function Driver for WinSock allows an authorized attacker to disclose information locally. If you need help checking exposure, call (864) 335-9223.
Sources
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