# CVE-2026-77031: Tenda CH22 command injection in formcreateFileName

Source: https://junglewise.ai/threats/cve-2026-77031-tenda-ch22-command-injection-in-formcreatefilename  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-20. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-77031 · Severity: high · CVSS 7.4 · Published 2026-08-20

Tenda CH22 is a networking device used for connectivity and network management. A vulnerability in its web management interface allows remote attackers to inject arbitrary commands by manipulating the fileName parameter, potentially enabling full device compromise without authentication.

Technologies: [Tenda CH22](https://junglewise.ai/threats/technologies/ch22). Vendors: [Tenda](https://junglewise.ai/threats/vendors/tenda).

## Quick answers

**Is CVE-2026-77031 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-77031 being exploited in the wild.

**How severe is CVE-2026-77031?** High severity, with a CVSS score of 7.4, published 20 August 2026.

**Which products and versions are affected?** Tenda CH22 1.0.0.1.

**Is there a fix for CVE-2026-77031?** 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-2026-77031 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-77031?** Check whether you run Tenda CH22 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 a command injection flaw in the formcreateFileName function of the /goform/formcreateFileName endpoint on Tenda CH22 version 1.0.0.1. The fileNameMit parameter is not properly sanitized before being used in a system command, allowing an unauthenticated remote attacker to inject arbitrary shell commands. An attacker can exploit this by sending a crafted HTTP request with malicious payload in the fileName parameter to achieve remote code execution on the device. No patch information is currently available in the advisory.

## Affected products

- Tenda CH22 1.0.0.1

## Timeline

- 2026-08-20: disclosed

## References

- [https://candle-throne-f75.notion.site/Tenda-CH22-formcreateFileName-392df0aa118580c38c4ad15fb15cd30d](https://candle-throne-f75.notion.site/Tenda-CH22-formcreateFileName-392df0aa118580c38c4ad15fb15cd30d)
- [https://vuldb.com/cve/CVE-2026-77031](https://vuldb.com/cve/CVE-2026-77031)

## Related threats

- [Tenda CH22 command injection in formexeCommand](https://junglewise.ai/threats/cve-2026-78141-tenda-ch22-command-injection-in-formexecommand)
- [Tenda CH22 command injection in editFileName](https://junglewise.ai/threats/cve-2026-78063-tenda-ch22-command-injection-in-editfilename)
- [Tenda CH22 buffer overflow in formCertListInfo](https://junglewise.ai/threats/cve-2026-15543-tenda-ch22-buffer-overflow-in-formcertlistinfo)
- [A vulnerability was detected in Tenda CH22 1.0.0.6(468). This issue affects the function R7WebsSecurityHandlerfunction…](https://junglewise.ai/threats/cve-2026-5962-a-vulnerability-was-detected-in-tenda-ch22-1-0-0-6-468-this-issue)
- [Tenda CH22 stack buffer overflow in formWrlExtraSet](https://junglewise.ai/threats/cve-2026-5605-tenda-ch22-stack-buffer-overflow-in-formwrlextraset)