CVE-2026-83990: CWE-121: Stack-based Buffer Overflow in Microsoft Windows 11 version 23H2
Stack-based buffer overflow in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a stack-based buffer overflow in the Microsoft Graphics Component on Windows 11 version 23H2 (build 10.0.22631.0). An authorized local attacker can exploit this flaw to elevate their privileges on the affected system. The CVSS v3.1 base score is 7.8, indicating high severity with high impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability, as documented in their security update guide.
Potential Impact
Successful exploitation allows a local authorized attacker to elevate privileges, potentially gaining higher-level access on the affected Windows 11 system. This can compromise system confidentiality, integrity, and availability.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 11 version 23H2 (build 10.0.22631.0) as soon as possible to remediate this vulnerability.
CVE-2026-83990: CWE-121: Stack-based Buffer Overflow in Microsoft Windows 11 version 23H2
Description
Stack-based buffer overflow in Microsoft Graphics Component 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
This vulnerability involves a stack-based buffer overflow in the Microsoft Graphics Component on Windows 11 version 23H2 (build 10.0.22631.0). An authorized local attacker can exploit this flaw to elevate their privileges on the affected system. The CVSS v3.1 base score is 7.8, indicating high severity with high impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability, as documented in their security update guide.
Potential Impact
Successful exploitation allows a local authorized attacker to elevate privileges, potentially gaining higher-level access on the affected Windows 11 system. This can compromise system confidentiality, integrity, and availability.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 11 version 23H2 (build 10.0.22631.0) as soon as possible to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-01T01:02:23.996Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83990","vendor":"Microsoft"}]
Threat ID: 6aa0457bacd9273b49fbdf63
Added to database: 09/08/2026, 17:27:23 UTC
Last enriched: 09/08/2026, 17:38:23 UTC
Last updated: 09/09/2026, 00:24:20 UTC
Views: 6
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