Quick answers
- Is CVE-2026-19976 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-19976 being exploited in the wild.
- How severe is CVE-2026-19976?
- Medium severity, with a CVSS score of 6.6, published 17 August 2026.
- Which products and versions are affected?
- Comfast CF-N1-S 2.6.0.1.
- Is there a fix for CVE-2026-19976?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-19976 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-19976?
- Check whether you run Comfast CF-N1-S at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A command injection vulnerability exists in the /cgi-bin/mbox-config CGI script of COMFAST CF-N1-S firmware version 2.6.0.1, specifically in the function sub_44A968. The vulnerability occurs when unsanitized user input in the macaddress parameter is passed to the ptest_macaddress section. An attacker can inject arbitrary shell commands via the macaddress argument, which are executed with device privileges. The vulnerability is network-accessible and does not require prior authentication. Exploitation allows complete remote code execution on the affected device. The vendor has not released patches despite early notification.
Affected products
- COMFAST CF-N1-S 2.6.0.1
Timeline
- 2026-08-17: disclosed
- 2026-08-17: kev added: CVE-2026-19976