CVE-2026-71330: CWE-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere in Microsoft Windows 10 Version 1607
Description
CVE-2026-71330 is a high-severity vulnerability in Microsoft Windows 10 Version 1607 and other specified versions. It involves exposure of sensitive system information through the Windows Services for NFS ONCRPC XDR Driver, allowing unauthorized attackers to disclose information over a network. The vulnerability has a CVSS score of 7.5 and has been officially fixed by Microsoft.
CVSS v3.1
Score 7.5high
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 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-2026-71330) affects multiple versions of Microsoft Windows 10, including Version 1607 and later builds up to specified patch levels. It is classified under CWE-497, indicating exposure of sensitive system information to an unauthorized control sphere. The flaw exists in the Windows Services for NFS ONCRPC XDR Driver, which can be exploited remotely without privileges or user interaction to disclose sensitive information over a network. Microsoft has published an official fix for this vulnerability.
Potential Impact
An attacker can remotely disclose sensitive system information without requiring privileges or user interaction. This information disclosure could aid in further attacks or reconnaissance. There is no impact on integrity or availability reported. No known exploits are currently observed in the wild.
Mitigation Recommendations
Microsoft has released official fixes for this vulnerability. Users and administrators should apply the available security updates as detailed in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-71330 to remediate this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-05T18:41:50.333Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-71330","vendor":"Microsoft"}]
Threat ID: 6aa0453eacd9273b49fa9c0d
Added to database: 09/08/2026, 17:26:22 UTC
Last enriched: 10/16/2026, 21:42:44 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 36
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