CVE-2025-57791: 
Commvault vulnerability analysis and mitigation

A security vulnerability (CVE-2025-57791) was discovered in Commvault versions before 11.36.60, affecting both Linux and Windows platforms. The vulnerability allows remote attackers to inject or manipulate command-line arguments passed to internal components due to insufficient input validation. When successfully exploited, it results in a valid user session for a low privilege role. The vulnerability was discovered in April 2025 and publicly disclosed on August 20, 2025 (Commvault Advisory, Hacker News).

The vulnerability has been assigned a CVSS v4.0 base score of 6.9 (Medium) with the vector string CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N. The issue stems from an argument injection vulnerability in the QLogin command functionality, where insufficient input validation allows attackers to manipulate command-line arguments. The vulnerability is specifically related to the authentication process where the backend API processes login requests through a .NET-based system (WatchTowr Labs).

When exploited, the vulnerability allows attackers to obtain a valid user session with low privilege access to the system. This can potentially be chained with other vulnerabilities to achieve more significant system compromise. The vulnerability affects both Linux and Windows deployments of Commvault software, though the Commvault SaaS solution is not impacted (Commvault Advisory, Fortra).

Commvault has released patches to address this vulnerability. Users running affected versions should upgrade to version 11.32.102 (for 11.32.x installations) or version 11.36.60 (for 11.36.x installations). The updates need to be installed on the CommServe, Web Server, and Command Center components. No action is required for Commvault SaaS customers as the vulnerability does not affect the SaaS deployment (Commvault Advisory).