Quick answers
- Is CVE-2026-86167 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-86167 being exploited in the wild.
- How severe is CVE-2026-86167?
- Critical severity, with a CVSS score of 9.9, published 6 September 2026.
- Which products and versions are affected?
- Tenda HG10 300001138.
- Is there a fix for CVE-2026-86167?
- 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-2026-86167 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-86167?
- Check whether you run Tenda HG10 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 classic OS command injection flaw in the Boa web server's formgponConf endpoint. The fmgpon_loid POST parameter is taken directly from user input and concatenated into a system command without proper validation, escaping, or filtering. An attacker can inject shell metacharacters (e.g., semicolons, pipes) to alter command execution flow and run arbitrary system commands. The vulnerability is remotely exploitable over the network without authentication, and a public proof-of-concept exists that demonstrates device shutdown via injected poweroff command.
Affected products
- Tenda HG10 300001138
Timeline
- 2026-09-06: disclosed
- exploited: Public proof-of-concept available