CVE-2026-40408: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in Windows Kernel-Mode Drivers on Windows 10 Version 1607. An authorized attacker with local access can exploit this flaw to elevate privileges, potentially gaining higher system rights. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has published an official security update to remediate this vulnerability.
Potential Impact
Successful exploitation allows a local attacker with authorized access to elevate their privileges, potentially leading to full system compromise. The vulnerability affects confidentiality, integrity, and availability of the system. No public exploits are currently known, but the high severity indicates significant risk if exploited.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators and users of Windows 10 Version 1607 (build 10.0.14393.0) should apply the security update provided by Microsoft as detailed in their advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40408. Applying this patch will remediate the vulnerability.
CVE-2026-40408: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Description
Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition in Windows Kernel-Mode Drivers on Windows 10 Version 1607. An authorized attacker with local access can exploit this flaw to elevate privileges, potentially gaining higher system rights. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has published an official security update to remediate this vulnerability.
Potential Impact
Successful exploitation allows a local attacker with authorized access to elevate their privileges, potentially leading to full system compromise. The vulnerability affects confidentiality, integrity, and availability of the system. No public exploits are currently known, but the high severity indicates significant risk if exploited.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators and users of Windows 10 Version 1607 (build 10.0.14393.0) should apply the security update provided by Microsoft as detailed in their advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40408. Applying this patch will remediate the vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-13T00:27:50.798Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40408","vendor":"Microsoft"}]
Threat ID: 6a036557cbff5d861008c9c4
Added to database: 5/12/2026, 5:37:27 PM
Last enriched: 5/12/2026, 6:23:37 PM
Last updated: 5/13/2026, 4:48:47 AM
Views: 2
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.