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