CVE-2026-40400: CWE-23: Relative Path Traversal in Microsoft Windows 10 Version 1607
CVE-2026-40400 is a high-severity vulnerability in Windows 10 Version 1607 involving a relative path traversal issue in Windows PowerShell. This flaw allows an authorized attacker to execute code remotely over a network. An official fix is available from Microsoft to address this vulnerability.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-40400) is a relative path traversal flaw in Windows PowerShell on Windows 10 Version 1607 (build 10.0.14393.0). It enables an attacker with authorized access to execute arbitrary code remotely over a network. The CVSS 3.1 base score is 8.0, indicating high severity, with network attack vector, low attack complexity, and requiring privileges and user interaction. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation allows an authorized attacker to execute arbitrary code remotely, potentially leading to full compromise of the affected system. The vulnerability impacts confidentiality, integrity, and availability with high severity.
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-2026-40400 to remediate this vulnerability.
CVE-2026-40400: CWE-23: Relative Path Traversal in Microsoft Windows 10 Version 1607
Description
CVE-2026-40400 is a high-severity vulnerability in Windows 10 Version 1607 involving a relative path traversal issue in Windows PowerShell. This flaw allows an authorized attacker to execute code remotely over a network. An official fix is available from Microsoft to address this vulnerability.
CVSS v3.1
Score 8.0high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-40400) is a relative path traversal flaw in Windows PowerShell on Windows 10 Version 1607 (build 10.0.14393.0). It enables an attacker with authorized access to execute arbitrary code remotely over a network. The CVSS 3.1 base score is 8.0, indicating high severity, with network attack vector, low attack complexity, and requiring privileges and user interaction. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation allows an authorized attacker to execute arbitrary code remotely, potentially leading to full compromise of the affected system. The vulnerability impacts confidentiality, integrity, and availability with high severity.
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-2026-40400 to remediate this 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-2026-40400","vendor":"Microsoft"}]
Threat ID: 6a566f6768715ace43e6b2ff
Added to database: 07/14/2026, 17:18:31 UTC
Last enriched: 07/15/2026, 02:04:23 UTC
Last updated: 07/15/2026, 02:04:23 UTC
Views: 2
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