CVE-2026-77683: Comfast CF-N1-S mbox-config system command injection

Severity: critical (CVSS 9.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-21 · updated 2026-10-16
Weakness: CWE-74

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.

Affected products

Comfast CF-N1-S: 2.6.0.1

References

https://github.com/AdminSafe/CVE/issues/8
https://vuldb.com/cve/CVE-2026-77683
https://vuldb.com/submit/881058
https://vuldb.com/vuln/394033
https://vuldb.com/vuln/394033/cti

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