Vulnerability · Published Aug 20, 2026 · Assigned by VulDB
CVE-2026-77004Comfast CF-N1-S mbox-config sprintf command injection
High 7.4
In plain English
A high-severity command injection in CF-N1-S from Comfast. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.8% (higher than 78% of all known vulnerabilities).
Severity (CVSS 3.1)7.4High
Exploit odds (30 days)1.8%top 21.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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§ion=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 (as reported)
Weakness: CWE-77, CWE-74 · Vector: 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
References
- VDB-393623 | Comfast CF-N1-S mbox-config sprintf command injection vdb-entry, technical-description
- VDB-393623 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- CVE-2026-77004 | CVE Analysis and Report third-party-advisory
- Submit #880584 | Comfast CF-N1-S V2 V2.6.0.1 Command Injection third-party-advisory
- https://github.com/lxiansheng488-bit/-/blob/main/%E5%8E%82%E5%95%86comefast%20%20CF-N1-S%20V2.pdf exploit