Advisory Details

April 15th, 2026

Microsoft Qlib _mount_nfs_uri Command Injection Remote Code Execution Vulnerability

CVE ID
CVSS SCORE	8.8, AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Qlib
VULNERABILITY DETAILS	This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Microsoft Qlib. Authentication is not required to exploit this vulnerability. The specific flaw exists within the _mount_nfs_uri function. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root.
ADDITIONAL DETAILS	Fixed on May 31, 2025 https://msrc.microsoft.com/update-guide/acknowledgement/online
DISCLOSURE TIMELINE	2025-05-22 - Vulnerability reported to vendor 2026-04-15 - Coordinated public release of advisory 2026-04-15 - Advisory Updated
CREDIT	Peter Girnus (@gothburz) of Trend Zero Day Initiative

BACK TO ADVISORIES