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CVE-2026-77683: Command Injection in Comfast CF-N1-S

0
Critical
VulnerabilityCVE-2026-77683cvecve-2026-77683
Published: 08/21/2026 (08/21/2026, 10:15:08 UTC)
Source: CVE Database V5
Vendor/Project: Comfast
Product: CF-N1-S

Description

A security flaw has been discovered in Comfast CF-N1-S 2.6.0.1. Affected by this issue is the function system of the file /cgi-bin/mbox-config?method=SET&section=ntp_timezone. The manipulation of the argument timestr results in command injection. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks.

CVSS v4.0

Score 9.4critical

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Vuln. Confidentiality
High
Vuln. Integrity
High
Vuln. Availability
High
Subsq. Confidentiality
High
Subsq. Integrity
High
Subsq. Availability
High
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P

Affected software

Affected versions
=2.6.0.12.6.0.1
CPE configurations
cpe:2.3:a:comfast:cf-n1-s:*:*:*:*:*:*:*:*

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/21/2026, 10:37:04 UTC

Technical Analysis

This vulnerability affects Comfast CF-N1-S version 2.6.0.1 and involves command injection via the timestr parameter in the system function of the /cgi-bin/mbox-config?method=SET&section=ntp_timezone endpoint. An attacker can remotely supply crafted input to execute arbitrary commands on the device. The CVSS 4.0 base score is 9.4, indicating critical severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, availability, and security requirements. Public exploit code has been released, but no official patch or fix has been documented.

Potential Impact

Successful exploitation allows remote attackers to execute arbitrary commands on the affected device, potentially leading to full compromise of the system. The vulnerability impacts confidentiality, integrity, and availability of the device and its data. Given the public availability of exploit code, the risk of active exploitation is elevated.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to the vulnerable endpoint and consider network-level controls to limit exposure. Monitor for any updates from Comfast regarding patches or mitigations.

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Technical Details

Data Version
5.2
Assigner Short Name
VulDB
Date Reserved
2026-08-21T05:31:50.847Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a8826fcacd9273b49fcf5f7

Added to database: 08/21/2026, 10:22:52 UTC

Last enriched: 08/21/2026, 10:37:04 UTC

Last updated: 08/21/2026, 11:03:50 UTC

Views: 21

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