CVE-2026-34340: CWE-416: Use After Free in Microsoft Windows 10 Version 1809
Use after free in Windows Projected File System allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-34340) involves a use-after-free condition in the Windows Projected File System on Windows 10 Version 1809 (build 10.0.17763.0). An authorized attacker with local access can exploit this flaw to elevate their privileges, potentially gaining higher system rights. The CVSS 3.1 base score is 7.0, reflecting high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to address this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining administrative control or access beyond their original permissions. This can lead to full system compromise or unauthorized actions at a higher privilege level.
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-2026-34340 for detailed patch information and deployment guidance.
CVE-2026-34340: CWE-416: Use After Free in Microsoft Windows 10 Version 1809
Description
Use after free in Windows Projected File System allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.0high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-34340) involves a use-after-free condition in the Windows Projected File System on Windows 10 Version 1809 (build 10.0.17763.0). An authorized attacker with local access can exploit this flaw to elevate their privileges, potentially gaining higher system rights. The CVSS 3.1 base score is 7.0, reflecting high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to address this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining administrative control or access beyond their original permissions. This can lead to full system compromise or unauthorized actions at a higher privilege level.
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-2026-34340 for detailed patch information and deployment guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-03-26T21:02:16.446Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34340","vendor":"Microsoft"}]
Threat ID: 6a036540cbff5d861008c481
Added to database: 05/12/2026, 17:37:04 UTC
Last enriched: 06/19/2026, 17:32:49 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 71
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