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Description

Improper validation of specified type of input in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

PUBLISHED Reserved 2026-01-29 | Published 2026-03-10 | Updated 2026-03-13 | Assigner microsoft




HIGH: 7.0CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Problem types

CWE-1287: Improper Validation of Specified Type of Input

Product status

10.0.14393.0 (custom) before 10.0.14393.8957
affected

10.0.17763.0 (custom) before 10.0.17763.8511
affected

10.0.19044.0 (custom) before 10.0.19044.7058
affected

10.0.19045.0 (custom) before 10.0.19045.7058
affected

10.0.22631.0 (custom) before 10.0.22631.6783
affected

10.0.22631.0 (custom) before 10.0.22631.6783
affected

10.0.26100.0 (custom) before 10.0.26100.8037
affected

10.0.26200.0 (custom) before 10.0.26200.8037
affected

10.0.28000.0 (custom) before 10.0.28000.1719
affected

10.0.28000.0 (custom) before 10.0.28000.1719
affected

6.2.9200.0 (custom) before 6.2.9200.25973
affected

6.2.9200.0 (custom) before 6.2.9200.25973
affected

6.3.9600.0 (custom) before 6.3.9600.23074
affected

6.3.9600.0 (custom) before 6.3.9600.23074
affected

10.0.14393.0 (custom) before 10.0.14393.8957
affected

10.0.14393.0 (custom) before 10.0.14393.8957
affected

10.0.17763.0 (custom) before 10.0.17763.8511
affected

10.0.17763.0 (custom) before 10.0.17763.8511
affected

10.0.20348.0 (custom) before 10.0.20348.4893
affected

10.0.25398.0 (custom) before 10.0.25398.2207
affected

10.0.26100.0 (custom) before 10.0.26100.32522
affected

10.0.26100.0 (custom) before 10.0.26100.32522
affected

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-25179 (Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability) vendor-advisory patch

cve.org (CVE-2026-25179)

nvd.nist.gov (CVE-2026-25179)

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