CVE-2026-20865: 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
CVE-2026-20865 is a use-after-free vulnerability (CWE-416) affecting Windows Management Services in Microsoft Windows 10 Version 1809 (build 10.0.17763.0). This vulnerability enables an authorized attacker with local access to elevate privileges by exploiting improper memory handling. The vulnerability has been assigned a CVSS v3.1 base score of 7.8, indicating high severity with impacts on confidentiality, integrity, and availability. Microsoft has released an official fix to address this issue, as documented in their security update guide.
Potential Impact
An authorized local attacker can exploit this use-after-free vulnerability to elevate their privileges on the affected system. This could lead to complete compromise of confidentiality, integrity, and availability of the system. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. It is recommended to apply the security update provided by Microsoft for Windows 10 Version 1809 (build 10.0.17763.0) as soon as possible to remediate this issue.
CVE-2026-20865: 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.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-20865 is a use-after-free vulnerability (CWE-416) affecting Windows Management Services in Microsoft Windows 10 Version 1809 (build 10.0.17763.0). This vulnerability enables an authorized attacker with local access to elevate privileges by exploiting improper memory handling. The vulnerability has been assigned a CVSS v3.1 base score of 7.8, indicating high severity with impacts on confidentiality, integrity, and availability. Microsoft has released an official fix to address this issue, as documented in their security update guide.
Potential Impact
An authorized local attacker can exploit this use-after-free vulnerability to elevate their privileges on the affected system. This could lead to complete compromise of confidentiality, integrity, and availability of the system. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. It is recommended to apply the security update provided by Microsoft for Windows 10 Version 1809 (build 10.0.17763.0) as soon as possible to remediate this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-03T05:54:20.381Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20865","vendor":"Microsoft"}]
Threat ID: 69668ae0a60475309f9ae133
Added to database: 01/13/2026, 18:11:44 UTC
Last enriched: 07/30/2026, 23:43:30 UTC
Last updated: 09/10/2026, 19:36:52 UTC
Views: 181
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