PT-2026-47913 · Microsoft · Winlogon+1

CVE-2026-42989 · Published 2026-06-09 · Updated 2026-06-12

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Winlogon (affected versions not specified)

Description Improper link resolution before file access, also known as link following, allows an authorized attacker to elevate privileges locally on the system.

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

DoS

Link Following

Weakness Enumeration

CWE-59

Related Identifiers

BDU:2026-08172

CVE-2026-42989

Affected Products

Windows

Winlogon

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-42989 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-42989 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-42989 · Security Note
• https://bdu.fstec.ru/vul/2026-08172 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/733264 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42989 · Vendor Advisory
• https://twitter.com/w3bd3vil/status/2065443999129997554 · Twitter Post
• https://t.me/cveNotify/167072 · Telegram Post