CVE-2026-40422: CWE-908: Use of Uninitialized Resource in Microsoft Windows 10 Version 1607
Use of uninitialized resource in Windows File Explorer allows an authorized attacker to disclose information locally.
AI Analysis
Technical Summary
This vulnerability involves the use of an uninitialized resource in Windows File Explorer on Windows 10 Version 1607 (build 10.0.14393.0). An authorized attacker with local access can leverage this flaw to disclose sensitive information. The CVSS 3.1 base score is 5.5, reflecting a medium severity with high confidentiality impact but no integrity or availability impact. The attack vector is local, requiring low privileges and no user interaction. Microsoft has released an official fix addressing this issue.
Potential Impact
An authorized local attacker can exploit this vulnerability to disclose sensitive information due to the use of an uninitialized resource in Windows File Explorer. There is no impact on integrity or availability. The vulnerability does not appear to be exploited 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 advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40422.
CVE-2026-40422: CWE-908: Use of Uninitialized Resource in Microsoft Windows 10 Version 1607
Description
Use of uninitialized resource in Windows File Explorer allows an authorized attacker to disclose information locally.
CVSS v3.1
Score 5.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves the use of an uninitialized resource in Windows File Explorer on Windows 10 Version 1607 (build 10.0.14393.0). An authorized attacker with local access can leverage this flaw to disclose sensitive information. The CVSS 3.1 base score is 5.5, reflecting a medium severity with high confidentiality impact but no integrity or availability impact. The attack vector is local, requiring low privileges and no user interaction. Microsoft has released an official fix addressing this issue.
Potential Impact
An authorized local attacker can exploit this vulnerability to disclose sensitive information due to the use of an uninitialized resource in Windows File Explorer. There is no impact on integrity or availability. The vulnerability does not appear to be exploited 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 advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40422.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-13T00:27:50.799Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40422","vendor":"Microsoft"}]
Threat ID: 6a566f6768715ace43e6b302
Added to database: 07/14/2026, 17:18:31 UTC
Last enriched: 08/13/2026, 14:14:30 UTC
Last updated: 08/28/2026, 22:52:10 UTC
Views: 55
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