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Vulnerability record · CVE-2026-67402 · published 4 September 2026

CVE-2026-67402: An insecure Apache configuration in ConfigServer Security & Firewall maps /usr/bin as CGI programs through the…

An insecure Apache configuration in ConfigServer Security & Firewall maps /usr/bin as CGI programs through the Messenger v3 HTTPS virtual host. A remote unauthenticated attacker whose address is blocked can request a mapped executable and run arbitrary commands as the Apache user. The vulnerability affects installations where CSF Messenger v3 and its HTTPS mode are enabled. WebPros addressed the vulnerability in version 16.31.

9.2 CVSS 4.0 Critical EPSS 0.54% · top 56.6% CWE-552 · CWE-552 Deferred
9.2CVSS 4.0 base score
0.54%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
9 Sep 2026Last modified by NVD

Description

An insecure Apache configuration in ConfigServer Security & Firewall maps /usr/bin as CGI programs through the Messenger v3 HTTPS virtual host. A remote unauthenticated attacker whose address is blocked can request a mapped executable and run arbitrary commands as the Apache user. The vulnerability affects installations where CSF Messenger v3 and its HTTPS mode are enabled. WebPros addressed the vulnerability in version 16.31.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://support.cpanel.net/hc/en-us/articles/43171958716439-Security-CSF-Security-Release-September-3rd-2026

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Source: NIST National Vulnerability Database (record CVE-2026-67402), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.