CVE-2026-40410: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Use after free in Windows SMB Client allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-40410) involves a use-after-free condition in the Windows SMB Client component of Microsoft Windows 10 Version 1607 (build 10.0.14393.0). An authorized attacker with local access can exploit this flaw to elevate their privileges on the affected system. The vulnerability is tracked under CWE-416 (Use After Free). Microsoft has released an official fix addressing this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining higher-level access than intended. The CVSS 3.1 base score is 7.0 (high), reflecting high impact on confidentiality, integrity, and availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1607 (build 10.0.14393.0) as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40410. Applying this patch fully mitigates the vulnerability.
CVE-2026-40410: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Description
Use after free in Windows SMB Client 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-2026-40410) involves a use-after-free condition in the Windows SMB Client component of Microsoft Windows 10 Version 1607 (build 10.0.14393.0). An authorized attacker with local access can exploit this flaw to elevate their privileges on the affected system. The vulnerability is tracked under CWE-416 (Use After Free). Microsoft has released an official fix addressing this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining higher-level access than intended. The CVSS 3.1 base score is 7.0 (high), reflecting high impact on confidentiality, integrity, and availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1607 (build 10.0.14393.0) as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40410. Applying this patch fully mitigates 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-2026-40410","vendor":"Microsoft"}]
Threat ID: 6a036557cbff5d861008c9c7
Added to database: 05/12/2026, 17:37:27 UTC
Last enriched: 06/19/2026, 17:39:40 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 60
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