CVE-2026-88126: CWE-822: Untrusted Pointer Dereference in Microsoft Windows 10 Version 1607
Description
CVE-2026-88126 is a high-severity vulnerability in Microsoft Windows 10 Version 1607 involving an untrusted pointer dereference in the WebDAV component. This flaw allows an authorized local attacker to elevate privileges. The vulnerability affects multiple Windows 10 builds prior to specific patched versions. An official fix is available from Microsoft.
CVSS v3.1
Score 7.8high
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
CVE-2026-88126 is a vulnerability classified as CWE-822 (Untrusted Pointer Dereference) affecting the WebDAV component in Microsoft Windows 10 Version 1607 and related builds. An authorized local attacker can exploit this flaw to elevate privileges on the affected system. The vulnerability has a CVSS 3.1 base score of 7.8, indicating high severity, with impacts on confidentiality, integrity, and availability. Multiple Windows 10 versions are affected, with patches released to address the issue. Microsoft has published an official advisory and fix for this vulnerability.
Potential Impact
The vulnerability allows an authorized local attacker to elevate privileges, potentially gaining higher-level access than intended. This can lead to full system compromise, affecting confidentiality, integrity, and availability of the system. 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 updates provided by Microsoft for the affected Windows 10 versions as detailed in the Microsoft Security Response Center advisory. No additional mitigations are specified beyond applying the official patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-09T21:53:00.397Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88126","vendor":"Microsoft"}]
Threat ID: 6ace855d2cdf04f6569ff516
Added to database: 10/13/2026, 19:24:13 UTC
Last enriched: 10/14/2026, 01:48:28 UTC
Last updated: 10/14/2026, 01:48:28 UTC
Views: 2
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