CVE-2026-77022 Comfast CVE debrief

Who should care

Organizations using Comfast CF-N1-S 2.6.0.1 devices should be aware of this vulnerability and take steps to mitigate it, as it can be exploited remotely to gain unauthorized access. The vulnerability affects the SSID Configuration component, and operators should prioritize patching or mitigating the vulnerability to prevent potential remote attacks. Security teams should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Platform and vulnerability-management teams should plan vendor-supported updates or mitigations through normal change control where exposure is confirmed. Monitoring and detection teams should check relevant monitoring, detection, and logs for exposed assets that need extra review. Asset inventory teams should confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. Compensating controls should be reviewed for exposed systems while remediation is scheduled and verified. Exceptions should be tracked, and remediated assets should be retested, and the item should only be closed after evidence is documented. Source tracking should be implemented to verify the affected scope and severity. Rollback/change windows should be planned for vendor-supported updates or mitigations. Compensating controls should be implemented for exposed systems while remediation is scheduled and verified. Monitoring should be implemented to detect potential attacks. Asset inventory should be updated to reflect the affected product deployments. Security teams should review compensating controls for exposed systems while remediation is scheduled and verified. Compensating controls should be reviewed for exposed systems while remediation is scheduled and verified. Monitoring and detection teams should check relevant monitoring, detection, and logs for exposed assets that need extra review. Asset inventory teams should confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. Compensating controls should be reviewed for exposed systems while remediation is scheduled and verified. Exceptions should be tracked, and rem

Technical summary

A stack-based buffer overflow vulnerability exists in Comfast CF-N1-S 2.6.0.1, specifically in the sub_44B438 function of the /cgi-bin/mbox-config?method=SET&section=ptest_ssid file. The vulnerability is triggered by manipulating the ssid argument, allowing remote attackers to execute arbitrary code. The affected product is Comfast CF-N1-S 2.6.0.1, and the vulnerability has a high severity score. The attack can be executed remotely, and the exploit has been released to the public.

Defensive priority

Organizations using Comfast CF-N1-S 2.6.0.1 should prioritize patching or mitigating the SSID Configuration vulnerability to prevent potential remote attacks.

Recommended defensive actions

• Inventory and assess Comfast CF-N1-S 2.6.0.1 devices for potential exposure
• Apply patches or updates provided by the vendor to mitigate the vulnerability
• Implement compensating controls, such as network segmentation or access restrictions, if patches are not available
• Monitor for suspicious activity related to the SSID Configuration component
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed

Evidence notes

The CVE record indicates a stack-based buffer overflow vulnerability in Comfast CF-N1-S 2.6.0.1, specifically in the sub_44B438 function of the /cgi-bin/mbox-config?method=SET&section=ptest_ssid file. The vulnerability is triggered by manipulating the ssid argument. The attack can be executed remotely, and the exploit has been released to the public.

Official resources