CVE-2026-65638

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.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.

Exploit odds

2.3% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2026-09-10 17:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-09-10 19:54 UTC Last updatedMost recent change to the record

Details

Published

2026-09-10 17:17 UTC

Last modified

2026-09-10 19:54 UTC

Exploit probability

2.3% · EPSS, next 30 days

Weakness

CWE-78 · OS command injection

Record status

Awaiting Analysis

Attack profile CVSS 4.0 · 9.2

Attack vector

Network

Complexity

Low

Attack requirements

Present

Privileges needed

None

User interaction

None

Confidentiality

High

Integrity

High

Availability

High