CVE-2026-11556 Tenda F451 Web Management WriteFacMac formWriteFacMac os command injection
Remote attackers can execute arbitrary OS commands on Tenda F451 routers via the Web Management Interface's WriteFacMac function.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-11556?
CVE-2026-11556 is a high-severity command injection vulnerability in Tenda F451, published on 8 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-11556?
How do I fix CVE-2026-11556?
No fix has been published for CVE-2026-11556 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-11556 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11556 exists.
Sources
Also known as GHSA-47fv-fgr6-m346.