CVE-2026-11556: Tenda F451 Web Management WriteFacMac formWriteFacMac os command injection

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-08 · updated 2026-07-23
Weakness: CWE-77

Description

A security flaw has been discovered in Tenda F451 1.0.0.7/1.0.0.9. Impacted is the function formWriteFacMac of the file /goform/WriteFacMac of the component Web Management Interface. Performing a manipulation of the argument mac results in os command injection. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks.

Affected products

Tenda F451: 1.0.0.7, 1.0.0.9

References

https://github.com/Robots10/IoT_vlu/blob/main/reports/Tenda/formWriteFacMac2/formWriteFacMac.md
https://vuldb.com/cve/CVE-2026-11556
https://vuldb.com/submit/836476
https://vuldb.com/vuln/369166
https://vuldb.com/vuln/369166/cti
https://www.tenda.com.cn/

Get alerted when CVE-2026-11556 or the next vulnerability affects your stack