CVE-2026-77004

Comfast CF-N1-S mbox-config sprintf command injection

State: Published
Severity: 5.3 Medium
Published: Aug 20, 2026
Updated: Aug 20, 2026
Reserved: Aug 20, 2026

Description

A flaw has been found in Comfast CF-N1-S 2.6.0.1. This impacts the function sprintf of the file /cgi-bin/mbox-config?method=SET&section=ptest_sn. Executing a manipulation of the argument sn can lead to command injection. The attack can be launched remotely. The exploit has been published and may be used.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P	VulDB
3.1	7.4 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:P/RL:X/RC:R	VulDB
3.0	7.4 High	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:P/RL:X/RC:R	VulDB
2.0	6.5 Medium	AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR	VulDB

Weaknesses

CWE-77 Command Injection
CWE-74 Injection

Affected Products

Product	Versions
CF-N1-SComfast	2.6.0.1Affected

References

VDB-393623 | Comfast CF-N1-S mbox-config sprintf command injectionvdb-entrytechnical-description
VDB-393623 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
CVE-2026-77004 | CVE Analysis and Reportthird-party-advisory
Submit #880584 | Comfast CF-N1-S V2 V2.6.0.1 Command Injectionthird-party-advisory
https://github.com/lxiansheng488-bit/-/blob/main/%E5%8E%82%E5%95%86comefast%20%20CF-N1-S%20V2.pdfexploit

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