CVE-2026-65638CWE-78command-injection

CVE-2026-65638

published September 10, 2026

CVSS
9.2
EPSS
2%
Percentile
83.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
9.2 · NONE
CVSS v4.0
9.2 · 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
EPSS
0.02330 · 83.3th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-09-10T21:17Z
References (1)
https://support.cpanel.net/hc/en-us/articles/43387915588375-Security-CVE-2026-65638-CSF-Security-Release · [email protected]
EPSS history
Timeline
  • 12 SEP 03:21Z
    EPSS moved — → 3%
    epss
  • 10 SEP 16:24Z
    Improper escaping of a request URL in ConfigServer Security & Firewall allows an unauthenticated remote attacker to execute arbitrary commands as the CSF…
    cvelistv5