CVE-2026-67599
ClearOS 7.9 OS Command Injection via Log Viewer filter parameter
CVSS Score
7.2
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-78 |
| Vendor | clearfoundation |
| Product | clearos |
| Published | Aug 3, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
ClearFoundation / ClearOS
7.9
References
Credits
Paul Serban (LazyTitan)