# CVE-2026-75364: Comfast CF-N1-S command injection in webmgnt

Source: https://junglewise.ai/threats/cve-2026-75364-comfast-cf-n1-s-command-injection-in-webmgnt  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-26. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-75364 · Severity: medium · CVSS 6.8 · Published 2026-08-26

Comfast CF-N1-S and CF-WR630AX are network access points used in homes and offices to provide WiFi and internet connectivity. A flaw in the web management interface allows an authenticated attacker to inject arbitrary system commands that execute with root privileges, potentially leading to complete device compromise, theft of WiFi credentials, installation of persistent backdoors, and lateral movement into the corporate or home network.

Technologies: [Comfast CF-N1-S](https://junglewise.ai/threats/technologies/cf-n1-s). Vendors: [Comfast](https://junglewise.ai/threats/vendors/comfast).

## Quick answers

**Is CVE-2026-75364 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-75364 being exploited in the wild.

**How severe is CVE-2026-75364?** Medium severity, with a CVSS score of 6.8, published 26 August 2026.

**Which products and versions are affected?** Comfast CF-N1-S 2.6.0.1; Comfast CF-WR630AX 2024-01-30 build (OpenWrt 21.02-SNAPSHOT r0-10d74dc).

**Is there a fix for CVE-2026-75364?** 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-2026-75364 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-75364?** Check whether you run Comfast CF-N1-S or Comfast CF-WR630AX 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

The vulnerability is an OS command injection (CWE-77) in the update_interface_png SET handler within the /usr/bin/webmgnt binary. The handler fails to sanitize the display_name parameter before passing it to sprintf() to construct an unquoted shell command template (`/etc/rrd/graphinterface %s %s`), which is then executed by system() with root privileges. An authenticated attacker can inject arbitrary shell metacharacters (e.g., `;cmd;#`) into the display_name field via a POST request to /cgi-bin/mbox-config to achieve remote code execution. Authentication is required, but default credentials (admin/admin) are commonly unchanged. PoC code is publicly available.

## Affected products

- Comfast CF-N1-S 2.6.0.1
- Comfast CF-WR630AX 2024-01-30 build (OpenWrt 21.02-SNAPSHOT r0-10d74dc)

## Timeline

- 2026-08-26: disclosed

## References

- [https://github.com/Flechao1/iot-vuln/tree/main/cve-pocs/CVE-2026-75364](https://github.com/Flechao1/iot-vuln/tree/main/cve-pocs/CVE-2026-75364)

## Related threats

- [Comfast CF-N1-S stack-based buffer overflow in web management](https://junglewise.ai/threats/cve-2026-94003-a-vulnerability-has-been-found-in-comfast-cf-n1-s-2-6-0-1)
- [Comfast CF-WR630AX command injection in webmgnt](https://junglewise.ai/threats/cve-2026-75363-comfast-cf-wr630ax-command-injection-in-webmgnt)
- [Comfast CF-N1-S stack buffer overflow in NTP timezone configuration](https://junglewise.ai/threats/cve-2026-78050-comfast-cf-n1-s-stack-buffer-overflow-in-ntp-timezone)
- [Comfast CF-N1-S command injection in NTP timezone](https://junglewise.ai/threats/cve-2026-77683-comfast-cf-n1-s-command-injection-in-ntp-timezone)
- [Comfast CF-N1-S stack-based buffer overflow in web management](https://junglewise.ai/threats/cve-2026-77148-comfast-cf-n1-s-stack-based-buffer-overflow-in-web-management)