CVE-2026-20923 Details
Description
Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.
A use-after-free vulnerability has been identified in Windows Management Services, allowing an authorized attacker to locally elevate privileges. This vulnerability arises from a race condition that exploitation could change the scope of the attack, enabling the execution of code or access to resources at a higher integrity level.
Users can apply the security update for this vulnerability through the Microsoft Update Catalog. Specific update details can be found in the Microsoft Knowledge Base articles KB5073379, KB5074109, KB5073450, KB5073724, and KB5073723.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jan 14, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20923 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| microsoft windows 10 1809 | < 10.0.17763.8276 |
CPE
Remediation
| |
| microsoft windows 10 21h2 | < 10.0.19044.6809 |
CPE
Remediation
| |
| microsoft windows 10 22h2 | < 10.0.19045.6809 |
CPE
Remediation
| |
| microsoft windows 11 23h2 | < 10.0.22631.6491 |
CPE
Remediation
| |
| microsoft windows 11 24h2 | < 10.0.26100.7623 |
CPE
Remediation
| |
| microsoft windows 11 25h2 | < 10.0.26200.7623 |
CPE
Remediation
| |
| microsoft windows server 2019 | < 10.0.17763.8276 |
CPE
Remediation
| |
| microsoft windows server 2022 | < 10.0.20348.4648 |
CPE
Remediation
| |
| microsoft windows server 2022 23h2 | < 10.0.25398.2092 |
CPE
Remediation
| |
| microsoft windows server 2025 | < 10.0.26100.32230 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 30, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jan 15, 2026 | Initial Analysis | [email protected] |
| Jan 13, 2026 | New CVE Received | [email protected] |