CVE-2026-3677 Tenda FH451 setcfm fromSetCfm stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the Tenda FH451 router via the setcfm endpoint, potentially leading to arbitrary code execution.
- 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-2026-3677?
CVE-2026-3677 is a high-severity memory corruption vulnerability in Tenda FH451, published on 7 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was found in Tenda FH451 1.0.0.9. This impacts the function fromSetCfm of the file /goform/setcfm. The manipulation of the argument funcname/funcpara1 results in stack-based buffer overflow. The attack may be performed from remote. The exploit has been made public and could be used.
Which versions are affected by CVE-2026-3677?
It affects 1 product.
Products include Tenda Fh451 Firmware.
How do I fix CVE-2026-3677?
No fix has been published for CVE-2026-3677 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-3677 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3677 exists.
Other vulnerabilities in Tenda FH451
Sources
Also known as GHSA-pm9x-mf77-6wwq.