CVE-2026-88093: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1809
Description
CVE-2026-88093 is a heap-based buffer overflow vulnerability in the Desktop Window Manager component of Microsoft Windows 10 Version 1809 and related builds. This flaw allows an authorized local attacker to elevate privileges on the affected system. The vulnerability has a high severity rating with a CVSS score of 7.8. Microsoft has released official fixes to address this issue.
CVSS v3.1
Score 7.8high
Affected software
Microsoft
Windows 10 Version 1809
Microsoft
Windows 10 Version 21H2
Microsoft
Windows 10 Version 22H2
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows 11 Version 26H2
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a heap-based buffer overflow in the Desktop Window Manager of Microsoft Windows 10 Version 1809 and other specified builds. An authorized attacker with local access can exploit this flaw to elevate their privileges, potentially gaining higher-level permissions on the system. The CVSS 3.1 vector indicates the attack requires local access with low complexity and privileges, no user interaction, and impacts confidentiality, integrity, and availability with high severity. Official patches have been released by Microsoft to remediate this vulnerability.
Potential Impact
Successful exploitation of this vulnerability allows an authorized local attacker to elevate their privileges, potentially leading to full system compromise. The impact affects confidentiality, integrity, and availability of the system as indicated by the CVSS score and vector.
Mitigation Recommendations
Microsoft has released official fixes for this vulnerability. It is recommended to apply the security updates provided by Microsoft for the affected Windows 10 versions to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-09T21:47:30.203Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88093","vendor":"Microsoft"}]
Threat ID: 6ace85572cdf04f6569ff33f
Added to database: 10/13/2026, 19:24:07 UTC
Last enriched: 10/14/2026, 02:04:26 UTC
Last updated: 10/14/2026, 02:04:26 UTC
Views: 3
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