PT-2026-2714 · Microsoft · Windows Local Session Manager+1

Jose Polo Bolano · Published 2026-01-13 · Updated 2026-01-15 · CVE-2026-20869

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 Local Session Manager (LSM) (affected versions not specified)

Description A flaw exists in Windows Local Session Manager (LSM) related to concurrent execution using a shared resource with improper synchronization, creating a race condition. This condition could allow an authorized attacker to elevate privileges locally.

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

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

BDU:2026-00503

CVE-2026-20869

Affected Products

Windows

Windows Local Session Manager

References · 8

• https://osv.dev/vulnerability/CVE-2026-20869 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-20869 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20869 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-20869 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-20869 · Security Note
• https://bdu.fstec.ru/vul/2026-00503 · Security Note
• https://twitter.com/CVEnew/status/2011759663318970709 · Twitter Post
• https://cybersecurity-help.cz/vulnerabilities/121405 · Note