PT-2026-2703 · Microsoft · Windows Management Services+1

Published 2026-01-13 · Updated 2026-01-15 · CVE-2026-20858

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows Management Services (affected versions not specified)

Description A use-after-free condition exists in Windows Management Services that could allow a locally authenticated attacker to gain elevated privileges. This issue 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.

Race Condition

Use After Free

Weakness Enumeration

CWE-362

CWE-416

Related Identifiers

BDU:2026-00501

CVE-2026-20858

Affected Products

Windows

Windows Management Services

References · 8

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20858 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-20858 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-20858 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-20858 · Security Note
• https://bdu.fstec.ru/vul/2026-00501 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-20858 · Vendor Advisory
• https://cybersecurity-help.cz/vulnerabilities/121317 · Note
• https://twitter.com/CVEnew/status/2011759668192809029 · Twitter Post