CVE-2026-77683 Comfast CVE debrief

Who should care

Organizations using Comfast CF-N1-S 2.6.0.1 should be aware of the command injection vulnerability and take steps to patch it. This includes reviewing the vulnerability's impact on their specific deployments, verifying the presence of affected systems, and applying vendor guidance for remediation. Security teams and vulnerability management teams should prioritize patching and monitor for potential attacks.

Technical summary

The CVE record indicates a command injection vulnerability in Comfast CF-N1-S 2.6.0.1. The vulnerability affects the /cgi-bin/mbox-config file, specifically the system function. The manipulation of the argument timestr results in command injection. The attack can be launched remotely. This vulnerability has been publicly disclosed and may be used for attacks. Affected organizations should prioritize patching the vulnerability.

Defensive priority

Organizations using Comfast CF-N1-S 2.6.0.1 should prioritize patching the command injection vulnerability in the /cgi-bin/mbox-config file.

Recommended defensive actions

• Patch the command injection vulnerability in the /cgi-bin/mbox-config file
• Verify and apply vendor remediation
• Monitor for potential attacks
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record indicates a command injection vulnerability in Comfast CF-N1-S 2.6.0.1. The vulnerability affects the /cgi-bin/mbox-config file. The attack can be launched remotely. Evidence is limited to public sources and may not reflect the full scope of affected systems or potential impact. Defenders should verify the presence of affected systems in their environment and review vendor guidance for patching and mitigation.

Official resources