CVE-2026-20858: CWE-416: Use After Free in Microsoft Windows 10 Version 1809
Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-20858) involves a use-after-free condition in Windows Management Services on Windows 10 Version 1809 (build 10.0.17763.0). An authorized local attacker could exploit this flaw to elevate their privileges on the affected system. The CVSS v3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. The attack vector requires local access with high attack complexity and low privileges but no user interaction. The vulnerability is confirmed published and a patch is available from Microsoft.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining higher system rights than intended. This could lead to full system compromise, including unauthorized access to sensitive data and disruption of system operations.
Mitigation Recommendations
A patch is available for this vulnerability. It is recommended to apply the official Microsoft update for Windows 10 Version 1809 (build 10.0.17763.0) to remediate this issue. No additional mitigation steps are specified or required beyond applying the patch.
CVE-2026-20858: CWE-416: Use After Free in Microsoft Windows 10 Version 1809
Description
Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-20858) involves a use-after-free condition in Windows Management Services on Windows 10 Version 1809 (build 10.0.17763.0). An authorized local attacker could exploit this flaw to elevate their privileges on the affected system. The CVSS v3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. The attack vector requires local access with high attack complexity and low privileges but no user interaction. The vulnerability is confirmed published and a patch is available from Microsoft.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining higher system rights than intended. This could lead to full system compromise, including unauthorized access to sensitive data and disruption of system operations.
Mitigation Recommendations
A patch is available for this vulnerability. It is recommended to apply the official Microsoft update for Windows 10 Version 1809 (build 10.0.17763.0) to remediate this issue. No additional mitigation steps are specified or required beyond applying the patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-03T05:54:20.380Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69668ae0a60475309f9ae108
Added to database: 1/13/2026, 6:11:44 PM
Last enriched: 4/3/2026, 12:46:15 PM
Last updated: 5/8/2026, 6:43:48 AM
Views: 149
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