CVE-2026-42837: CWE-125: Out-of-bounds Read in Microsoft Windows 10 Version 1809
CVE-2026-42837 is a high-severity vulnerability in Microsoft Windows 10 Version 1809 involving a buffer over-read in the Windows Projected File System Filter Driver. This flaw allows an authorized local attacker to elevate privileges. An official fix is available from Microsoft.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-42837) is a buffer over-read issue classified under CWE-125 affecting the Windows Projected File System Filter Driver in Windows 10 Version 1809 (build 10.0.17763.0). It enables an authorized local attacker to elevate privileges on the affected system. The CVSS v3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining higher-level access and control over the affected Windows 10 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 10 Version 1809 to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42837 for detailed patching instructions.
CVE-2026-42837: CWE-125: Out-of-bounds Read in Microsoft Windows 10 Version 1809
Description
CVE-2026-42837 is a high-severity vulnerability in Microsoft Windows 10 Version 1809 involving a buffer over-read in the Windows Projected File System Filter Driver. This flaw allows an authorized local attacker to elevate privileges. An official fix is available from Microsoft.
CVSS v3.1
Score 7.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-42837) is a buffer over-read issue classified under CWE-125 affecting the Windows Projected File System Filter Driver in Windows 10 Version 1809 (build 10.0.17763.0). It enables an authorized local attacker to elevate privileges on the affected system. The CVSS v3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining higher-level access and control over the affected Windows 10 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 10 Version 1809 to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42837 for detailed patching instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-30T14:51:12.704Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42837","vendor":"Microsoft"}]
Threat ID: 6a284cc08dd33fbd856646d6
Added to database: 6/9/2026, 5:26:24 PM
Last enriched: 6/9/2026, 11:12:27 PM
Last updated: 6/10/2026, 5:04:48 AM
Views: 2
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