Vulnerability record · CVE-2021-4470 · published 14 November 2025

CVE-2021-4470: OS command injection vulnerability

TG8 Firewall contains a pre-authentication remote code execution vulnerability in the runphpcmd.php endpoint. The syscmd POST parameter is passed directly to a system command without validation and executed with root privileges. A remote, unauthenticated attacker can supply crafted values to execute arbitrary operating system commands as root, resulting in full device compromise.

9.3 CVSS 4.0 Critical EPSS 1.0% · top 38.2% CWE-78 · OS command injection Deferred

9.3CVSS 4.0 base score

1.0%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

4References

17 Jun 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/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

Link	Tags
https://ssd-disclosure.com/ssd-advisory-tg8-firewall-preauth-rce-and-password-disclosure/
https://web.archive.org/web/20211024224240/http://www.tg8security.com/
https://www.vulncheck.com/advisories/tg8-firewall-unauthenticated-rce-via-runphpcmd-php
https://ssd-disclosure.com/ssd-advisory-tg8-firewall-preauth-rce-and-password-disclosure/

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-4470), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.