Is CVE-2021-40875 actively exploited?

Yes. CVE-2021-40875 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-40875 be exploited remotely?

The attack vector of CVE-2021-40875 has not been classified yet.

What is the CVSS score of CVE-2021-40875?

CVE-2021-40875 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-40875

UNKNOWNCISA KEVIN THE WILD

CVE-2021-40875

Published: April 11, 2026

EPSS:81.11%probability of exploitation in 30 daysPercentile:99.2th

Official Description

Improper Access Control in Gurock TestRail versions < 7.2.0.3014 resulted in sensitive information exposure. A threat actor can access the /files.md5 file on the client side of a Gurock TestRail application, disclosing a full list of application files and the corresponding file paths. The corresponding file paths can be tested, and in some cases, result in the disclosure of hardcoded credentials, API keys, or other sensitive data.

NVD Source

Technical Analysis

CVE-2021-40875 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2021-40875 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.