Description

Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.

INFO

Published Date :

2026-01-13T17:56:31.998Z

Last Modified :

2026-01-20T17:34:51.175Z

Source :

microsoft
AFFECTED PRODUCTS

The following products are affected by CVE-2026-20858 vulnerability.

Vendors Products
Microsoft
  • Windows 10 1809
  • Windows 10 21h2
  • Windows 10 21h2
  • Windows 10 22h2
  • Windows 10 22h2
  • Windows 11 23h2
  • Windows 11 23h2
  • Windows 11 24h2
  • Windows 11 24h2
  • Windows 11 25h2
  • Windows 11 25h2
  • Windows Server 2019
  • Windows Server 2022
  • Windows Server 2022 23h2
  • Windows Server 2025
  • Windows Server 23h2
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-20858.

URL Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20858 cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact