CVE-2025-7796 Tenda FH451 PPTPDClient fromPptpUserAdd stack-based overflow
A remote attacker can trigger a stack-based buffer overflow in the PPTPDClient component of Tenda FH451 routers, 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-2025-7796?
CVE-2025-7796 is a high-severity memory corruption vulnerability in Tenda FH451, published on 18 Jul 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability, which was classified as critical, was found in Tenda FH451 1.0.0.9. This affects the function fromPptpUserAdd of the file /goform/PPTPDClient. The manipulation of the argument Username leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2025-7796?
It affects 1 product.
Products include Tenda Fh451 Firmware.
How do I fix CVE-2025-7796?
No fix has been published for CVE-2025-7796 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-2025-7796 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7796 exists.
Other vulnerabilities in Tenda FH451
Sources
Also known as GHSA-jx4p-33jj-p9hw.