CVE-2021-4470

CVE-2021-4470 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Description

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.

Frequently asked questions

What is CVE-2021-4470?
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.
How severe is CVE-2021-4470?
CVE-2021-4470 has a CVSS 4.0 base score of 9.3, rated critical severity.
Is CVE-2021-4470 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2021-4470?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2021-4470 have an EU (EUVD) identifier?
Yes. CVE-2021-4470 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34721.
When was CVE-2021-4470 published?
CVE-2021-4470 was published on 2025-11-14 and last updated on 2026-06-17.

References

Other CWE-78 (OS Command Injection) vulnerabilities

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