Exposure of Sensitive System Information to an Unauthorized Control Sphere in Microsoft Windows and Windows Server - CVE-2026-71330
Published: September 9, 2026
Vulnerability identifier: #VU148057
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-71330
CWE-ID: CWE-497
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to exposure of sensitive system information to an unauthorized control sphere in the Windows Services for NFS ONCRPC XDR Driver when handling network requests. A remote attacker can send a specially crafted network request to disclose sensitive information.
Successful exploitation can disclose small portions of uninitialized kernel stack memory.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-71330
Install security update from vendor's website.
Microsoft Windows - addressed in versions 10 21H2 10.0.19044.7725, 10 22H2 10.0.19045.7725, 10 1607 10.0.14393.9512, 10 1809 10.0.17763.9245, 11 23H2 10.0.22631.7582, 11 24H2 10.0.26100.9445, 11 25H2 10.0.26200.9445, 11 26H1 10.0.28000.2954
Windows Server - addressed in versions 2012 R2 6.3.9600.23397, 2012 6.2.9200.26349, 2016 10.0.14393.9512, 2019 10.0.17763.9245, 2022 10.0.20348.5622, 2025 10.0.26100.33438
Windows Server - addressed in versions 2012 R2 6.3.9600.23397, 2012 6.2.9200.26349, 2016 10.0.14393.9512, 2019 10.0.17763.9245, 2022 10.0.20348.5622, 2025 10.0.26100.33438