CVE-2026-11522 Tenda W20E setPortMirror formSetPortMirror stack-based overflow
A remote attacker can trigger a stack-based buffer overflow in the Tenda W20E router via the setPortMirror 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-2026-11522?
CVE-2026-11522 is a high-severity memory corruption vulnerability in Tenda W20E, published on 8 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was detected in Tenda W20E 15.11.0.6. This vulnerability affects the function formSetPortMirror of the file /goform/setPortMirror. Performing a manipulation of the argument portMirrorMirroredPorts results in stack-based buffer overflow. The attack can be initiated remotely. The exploit is now public and may be used.
Which versions are affected by CVE-2026-11522?
How do I fix CVE-2026-11522?
No fix has been published for CVE-2026-11522 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-2026-11522 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11522 exists.
Sources
Also known as GHSA-3fr6-p7vj-gvw2.