Command Injection Vulnerability in Comfast CF-N1-S Product
CVE-2026-77683

9.4CRITICAL

Key Information:

Vendor

Comfast

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-77683?

A security flaw has been identified in the Comfast CF-N1-S, specifically in version 2.6.0.1. The vulnerability affects the /cgi-bin/mbox-config?method=SET&section=ntp_timezone file, where manipulation of the 'timestr' argument can lead to command injection attacks. This vulnerability can be exploited remotely, allowing attackers to execute arbitrary commands on the affected device. The exploit has been made public, necessitating prompt action to protect vulnerable systems from potential threats.

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-2026-77683 - Proof of Concept

References

https://vuldb.com/vuln/394033
vdb-entrytechnical-description
https://vuldb.com/vuln/394033/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-77683
third-party-advisory

CVSS V4

Score:
9.4
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

010hex (VulDB User)
.