Vulnerability · Published Sep 10, 2026 · Assigned by hackerone
CVE-2026-65638
Critical 9.2
In plain English
A critical-severity OS command injection in ConfigServer Security & Firewall from ConfigServer. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.3% (higher than 84% of all known vulnerabilities).
Official description
Improper escaping of a request URL in ConfigServer Security & Firewall allows an unauthenticated remote attacker to execute arbitrary commands as the CSF service account via shell command injection. The vulnerability affects versions of the software originally distributed by ConfigServer, as well as versions of the WebPros-maintained fork that contain the vulnerable code. WebPros has addressed the vulnerability in version 16.30. Other forks or independently maintained versions of ConfigServer Security & Firewall (CSF) may also be affected and should be evaluated independently.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| WebPros | ConfigServer Security & Firewall | 14.00 – before 16.30 |
| ConfigServer | ConfigServer Security & Firewall | 14.00 – before * |
Weakness: CWE-78 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N