Command Injection Vulnerability in COMFAST CF-N1-S by COMFAST
CVE-2026-19976

5.1MEDIUM

Key Information:

Vendor

Comfast

Status
Cf-n1-s
Vendor
CVE Published:
17 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-19976?

A command injection vulnerability exists in the COMFAST CF-N1-S version 2.6.0.1. The flaw lies in the unvalidated handling of the 'macaddress' parameter in the sub_44A968 function within the /cgi-bin/mbox-config path. An attacker can exploit this to execute arbitrary commands on the device remotely. There has been a public disclosure of this exploit, indicating potential risk to users, yet the vendor has not addressed the matter despite being informed.

Affected Version(s)

CF-N1-S 2.6.0.1

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-2026-19976 - Proof of Concept

References

https://vuldb.com/vuln/391155
vdb-entrytechnical-description
https://vuldb.com/vuln/391155/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-19976
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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

ChaoRenChaoJiWuDi (VulDB User)
VulDB CNA Team
.