PT-2025-36842 · Microsoft · Windows Ancillary Function Driver For Winsock+1

Angelboy · Published 2025-09-09 · Updated 2025-11-20 · CVE-2025-54099

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: Windows Ancillary Function Driver for WinSock (affected versions not specified)

Description: A stack-based buffer overflow exists in the Windows Ancillary Function Driver for WinSock. This issue allows a locally authorized attacker to elevate privileges. The vulnerability allows attackers to affect the system.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

LPE

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

BDU:2025-11118

CVE-2025-54099

Affected Products

Windows

Windows Ancillary Function Driver For Winsock

References · 9

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-54099 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-54099 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-54099 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-54099 · Security Note
• https://osv.dev/vulnerability/CVE-2025-54099 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-11118 · Security Note
• https://t.me/msrcreports/2277 · Telegram Post
• https://t.me/cveNotify/137216 · Telegram Post
• https://twitter.com/CVEnew/status/1965557758125580416 · Twitter Post