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Vulnerability · Published Sep 3, 2026 · Assigned by hackerone

CVE-2026-67402

Critical 9.2

In plain English

A critical-severity security flaw 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 0.5% (higher than 46% of all known vulnerabilities).

Severity (CVSS 4.0)9.2Critical
Exploit odds (30 days)0.5%top 54.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
WebPros ConfigServer Security & Firewall 14.02 – before 16.31
ConfigServer ConfigServer Security & Firewall 14.02 – before *

Weakness: CWE-552 · 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

References