CVE-2026-88137: CWE-552: Files or Directories Accessible to External Parties in Microsoft Windows 10 Version 1607
Description
CVE-2026-88137 is a vulnerability in Microsoft Windows 10 Version 1607 and related builds where files or directories accessible via WebDAV can be accessed by external parties. This allows an authorized attacker to disclose sensitive information over a network without user interaction. The vulnerability has a medium severity with a CVSS score of 6.5 and has been officially fixed by Microsoft.
CVSS v3.1
Score 6.5medium
Affected software
Microsoft
Windows 10 Version 1607
Microsoft
Windows 10 Version 1809
Microsoft
Windows 10 Version 21H2
Microsoft
Windows 10 Version 22H2
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows 11 Version 26H2
Microsoft
Windows Server 2012
Microsoft
Windows Server 2012 (Server Core installation)
Microsoft
Windows Server 2012 R2
Microsoft
Windows Server 2012 R2 (Server Core installation)
Microsoft
Windows Server 2016
Microsoft
Windows Server 2016 (Server Core installation)
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-88137) involves files or directories accessible to external parties through WebDAV on affected versions of Microsoft Windows 10, including Version 1607 and several other builds. An authorized attacker can exploit this to disclose information over a network. The CVSS 3.1 base score is 6.5, indicating a medium severity impact primarily on confidentiality (high impact on confidentiality, no impact on integrity or availability). The vulnerability requires low attack complexity and privileges, with no user interaction needed. Microsoft has released an official fix for this issue.
Potential Impact
An authorized attacker can disclose sensitive information over the network by accessing files or directories exposed via WebDAV on affected Windows 10 versions. The confidentiality impact is high, but integrity and availability are not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. Users and administrators should apply the security updates provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88137 to remediate this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-09T21:53:00.398Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88137","vendor":"Microsoft"}]
Threat ID: 6ace855f2cdf04f6569ff901
Added to database: 10/13/2026, 19:24:15 UTC
Last enriched: 10/14/2026, 01:34:48 UTC
Last updated: 10/14/2026, 01:34:48 UTC
Views: 2
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