CVE-2026-77683: Command Injection in Comfast CF-N1-S
Description
CVE-2026-77683 is a critical command injection vulnerability in Comfast CF-N1-S version 2.6.0.1. The flaw exists in the system function of the /cgi-bin/mbox-config?method=SET§ion=ntp_timezone endpoint, where manipulation of the 'timestr' argument allows remote attackers to execute arbitrary commands. Public exploit code is available, increasing the risk of exploitation.
CVSS v4.0
Score 9.4critical
Affected software
Comfast
CF-N1-S
cpe:2.3:a:comfast:cf-n1-s:*:*:*:*:*:*:*:*AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects Comfast CF-N1-S firmware version 2.6.0.1. The issue lies in the system function called by the /cgi-bin/mbox-config?method=SET§ion=ntp_timezone CGI endpoint. By manipulating the 'timestr' parameter, an attacker can perform command injection remotely without user interaction and with low attack complexity. The CVSS v4.0 score is 9.4, indicating a critical severity. Exploit code has been publicly released, which may facilitate attacks.
Potential Impact
Successful exploitation allows remote attackers to execute arbitrary commands on the affected device with limited privileges but without user interaction. This can lead to full system compromise, data theft, or disruption of device functionality. The availability of public exploit code increases the likelihood of attacks.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the vulnerable endpoint and monitor for suspicious activity. Avoid exposing the device management interface to untrusted networks.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-08-21T05:31:50.847Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a8826fcacd9273b49fcf5f7
Added to database: 08/21/2026, 10:22:52 UTC
Last enriched: 09/10/2026, 18:47:34 UTC
Last updated: 10/05/2026, 18:48:22 UTC
Views: 217
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