CVE-2026-65639

What it is

OS command injection in the advanced-rule parser of ConfigServer Security & Firewall allows a remote attacker who controls a configured allow/deny feed to execute arbitrary commands as root, due to insufficient validation of feed-supplied rule data. 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

1.4% 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. 2026-07-22 15:00 UTC ReservedThe CVE id was reserved by its CNA
2. 2026-09-10 17:17 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 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

1.4% · EPSS, next 30 days

Weakness

CWE-78 · OS command injection

Record status

Awaiting Analysis

Attack profile CVSS 4.0 · 9.5

Attack vector

Network

Complexity

Low

Attack requirements

Present

Privileges needed

None

User interaction

None

Confidentiality

High

Integrity

High

Availability

High