Remote Code Execution Vulnerability in TG8 Firewall by TG8 Security
CVE-2021-4470

9.3CRITICAL

Key Information:

Vendor

Tg8

Status
Tg8 Firewall
Vendor
CVE Published:
14 November 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-4470?

The TG8 Firewall has a pre-authentication remote code execution flaw affecting the runphpcmd.php endpoint. The vulnerability arises because the syscmd POST parameter is sent directly to a system command without proper validation and is executed with root privileges. An unauthenticated attacker can exploit this flaw by providing specially crafted input, allowing them to execute arbitrary commands on the operating system with root-level access. This can lead to a complete compromise of the affected device, posing significant security risks for users.

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Affected Version(s)

TG8 Firewall 0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-4470 - Proof of Concept

References

https://ssd-disclosure.com/ssd-advisory-tg8-firewall-prea...
technical-descriptionexploit
https://web.archive.org/web/20211024224240/http://www.tg8...
product
https://www.vulncheck.com/advisories/tg8-firewall-unauthe...
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

SSD Secure Disclosure
JSON
.