CVE-2026-40422: CWE-908: Use of Uninitialized Resource in Microsoft Windows 10 Version 1607
CVE-2026-40422 is a vulnerability in Microsoft Windows 10 Version 1607 where an uninitialized resource in Windows File Explorer can be exploited by an authorized local attacker to disclose information. The vulnerability has a medium severity with a CVSS score of 5.5. An official fix is available from Microsoft.
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 local attacker with low privileges can leverage this flaw to disclose sensitive information locally. The vulnerability is classified under CWE-908 (Use of Uninitialized Resource). Microsoft has published an official fix to address this issue.
Potential Impact
The vulnerability allows an authorized local attacker to disclose information due to the use of an uninitialized resource in Windows File Explorer. There is no impact on integrity or availability, and no known exploits are currently in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40422 to remediate this vulnerability.
CVE-2026-40422: CWE-908: Use of Uninitialized Resource in Microsoft Windows 10 Version 1607
Description
CVE-2026-40422 is a vulnerability in Microsoft Windows 10 Version 1607 where an uninitialized resource in Windows File Explorer can be exploited by an authorized local attacker to disclose information. The vulnerability has a medium severity with a CVSS score of 5.5. An official fix is available from Microsoft.
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 local attacker with low privileges can leverage this flaw to disclose sensitive information locally. The vulnerability is classified under CWE-908 (Use of Uninitialized Resource). Microsoft has published an official fix to address this issue.
Potential Impact
The vulnerability allows an authorized local attacker to disclose information due to the use of an uninitialized resource in Windows File Explorer. There is no impact on integrity or availability, and no known exploits are currently in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40422 to remediate this vulnerability.
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: 07/15/2026, 02:04:18 UTC
Last updated: 07/15/2026, 03:42:09 UTC
Views: 5
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