CVE-2026-104611 Tenda AC9 POST Request fast_setting_internet_set stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the Tenda AC9 router via a crafted POST request, potentially leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-104611?
CVE-2026-104611 is a critical memory corruption vulnerability in Tenda AC9, published on 2 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A vulnerability was detected in Tenda AC9 15.03.02.13. Affected is an unknown function of the file /goform/fast_setting_internet_set of the component POST Request Handler. Performing a manipulation of the argument netWanType results in stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit is now public and may be used.
Which versions are affected by CVE-2026-104611?
How do I fix CVE-2026-104611?
No fix has been published for CVE-2026-104611 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-2026-104611 being exploited?
There is no known exploitation of CVE-2026-104611 in the wild and no public exploit code.
Sources
Also known as GHSA-5xvg-86hf-5h5q.