Vulnerability · Published Aug 3, 2026 · Assigned by VulnCheck
CVE-2026-67599ClearOS 7.9 OS Command Injection via Log Viewer filter parameter
High 7.2
In plain English
A high-severity OS command injection in ClearOS from ClearFoundation. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.4% (higher than 84% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
ClearOS 7.9 contains an OS command injection vulnerability in the Log Viewer component that allows authenticated attackers to execute arbitrary commands by submitting unsanitized input through the filter parameter, which is interpolated directly into a shell command in File.php. Attackers can inject command substitution payloads into the filter parameter to execute arbitrary commands as the webconfig user, and due to extensive NOPASSWD sudo privileges granted to that user by default, immediately escalate to root.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ClearFoundation | ClearOS | 7.9 |
Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
References
- Researcher Disclosure technical-description, exploit
- Product Webpage product
- https://www.vulncheck.com/advisories/clearos-os-command-injection-via-log-viewer-filter-parameter third-party-advisory