CVE-2026-85109 Tenda HG10 Boa Web Server formLogin buffer overflow
Remote attackers can trigger a buffer overflow in the Tenda HG10 Boa Web Server login form, potentially leading to code execution or service disruption.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85109?
CVE-2026-85109 is a critical memory corruption vulnerability in Tenda HG10, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was determined in Tenda HG10 300001138. This issue affects the function formLogin of the file /boaform/formLogin of the component Boa Web Server. Executing a manipulation of the argument Username can lead to buffer overflow. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized.
Which versions are affected by CVE-2026-85109?
How do I fix CVE-2026-85109?
No fix has been published for CVE-2026-85109 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-2026-85109 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85109 exists.
Sources
Also known as GHSA-w4wj-hq79-xrch.