CVE-2026-9431 Tenda F1202 PptpUserAdd fromPptpUserAdd stack-based overflow
A remote attacker can trigger a stack-based buffer overflow in the Tenda F1202 router's PptpUserAdd function, 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-2026-9431?
CVE-2026-9431 is a high-severity memory corruption vulnerability in Tenda F1202, published on 25 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was identified in Tenda F1202 1.2.0.20(408). This affects the function fromPptpUserAdd of the file /goform/PptpUserAdd. The manipulation of the argument opttype leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit is publicly available and might be used.
Which versions are affected by CVE-2026-9431?
How do I fix CVE-2026-9431?
No fix has been published for CVE-2026-9431 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-2026-9431 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9431 exists.
Sources
Also known as GHSA-545r-9pqj-cc7g.