CVE-2026-27931: CWE-125: Out-of-bounds Read in Microsoft Windows 10 Version 21H2
Out-of-bounds read in Windows GDI allows an unauthorized attacker to disclose information locally.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds read (CWE-125) in the Windows Graphics Device Interface (GDI) on Windows 10 Version 21H2 (build 10.0.19044.0). It enables a local attacker without privileges to cause information disclosure by reading memory beyond allocated buffers. The issue has been assigned CVE-2026-27931 and has a CVSS 3.1 base score of 5.5, reflecting medium severity. Microsoft has released an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation of this vulnerability allows an unauthorized local attacker to read sensitive information from memory, potentially leading to information disclosure. There is no impact on system integrity or availability. No remote exploitation or privilege escalation is indicated.
Mitigation Recommendations
An official patch is available from Microsoft to fix this vulnerability. It is recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27931 promptly to mitigate the risk. No additional mitigations are specified or required.
CVE-2026-27931: CWE-125: Out-of-bounds Read in Microsoft Windows 10 Version 21H2
Description
Out-of-bounds read in Windows GDI allows an unauthorized attacker to disclose information locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds read (CWE-125) in the Windows Graphics Device Interface (GDI) on Windows 10 Version 21H2 (build 10.0.19044.0). It enables a local attacker without privileges to cause information disclosure by reading memory beyond allocated buffers. The issue has been assigned CVE-2026-27931 and has a CVSS 3.1 base score of 5.5, reflecting medium severity. Microsoft has released an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation of this vulnerability allows an unauthorized local attacker to read sensitive information from memory, potentially leading to information disclosure. There is no impact on system integrity or availability. No remote exploitation or privilege escalation is indicated.
Mitigation Recommendations
An official patch is available from Microsoft to fix this vulnerability. It is recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27931 promptly to mitigate the risk. No additional mitigations are specified or required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-02-24T21:35:49.688Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27931","vendor":"Microsoft"}]
Threat ID: 69de7a2782d89c981fd6ba56
Added to database: 4/14/2026, 5:32:23 PM
Last enriched: 4/14/2026, 6:47:24 PM
Last updated: 4/15/2026, 6:03:55 AM
Views: 2
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