CVE-2026-34346

MEDIUM

Windows Ancillary Function Driver for WinSock Information Disclosure Vulnerability

Title source: cna
STIX 2.1

Description

Cleartext transmission of sensitive information in Windows Ancillary Function Driver for WinSock allows an authorized attacker to disclose information locally.

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
Windows Ancillary Function Driver for WinSock Information Disclosure Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34346

Scores

CVSS v3 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

Details

CWE
CWE-319
Status published
Products (19)
Microsoft/Windows 10 Version 1607 10.0.14393.0 - 10.0.14393.9339
Microsoft/Windows 10 Version 1809 10.0.17763.0 - 10.0.17763.9020
Microsoft/Windows 10 Version 21H2 10.0.19044.0 - 10.0.19044.7548
Microsoft/Windows 10 Version 22H2 10.0.19045.0 - 10.0.19045.7548
Microsoft/Windows 11 version 23H2 10.0.22631.0 - 10.0.22631.7376
Microsoft/Windows 11 Version 24H2 10.0.26100.0 - 10.0.26100.8875
Microsoft/Windows 11 Version 25H2 10.0.26200.0 - 10.0.26200.8875
Microsoft/Windows 11 version 26H1 10.0.28000.0 - 10.0.28000.2269
Microsoft/Windows Server 2012 6.2.9200.0 - 6.2.9200.26226
Microsoft/Windows Server 2012 (Server Core installation) 6.2.9200.0 - 6.2.9200.26226
... and 9 more
Published Jul 14, 2026
Tracked Since Jul 14, 2026