CVE-2026-77004: Comfast CF-N1-S mbox-config sprintf command injection

Severity: high (CVSS 7.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-20 · updated 2026-10-18
Weakness: CWE-74

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.

Affected products

Comfast CF-N1-S: 2.6.0.1

References

https://github.com/lxiansheng488-bit/-/blob/main/%E5%8E%82%E5%95%86comefast%20%20CF-N1-S%20V2.pdf
https://vuldb.com/cve/CVE-2026-77004
https://vuldb.com/submit/880584
https://vuldb.com/vuln/393623
https://vuldb.com/vuln/393623/cti

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