CVE-2026-11523 Tenda W20E Web Management PortalAuth formPortalAuth stack-based overflow
A remote attacker can trigger a stack-based buffer overflow in the Tenda W20E web portal via the gotoUrl parameter, potentially leading to 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-2026-11523?
CVE-2026-11523 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 flaw has been found in Tenda W20E 15.11.0.6. This issue affects the function formPortalAuth of the file /goform/PortalAuth of the component Web Management Interface. Executing a manipulation of the argument gotoUrl can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has been published and may be used.
Which versions are affected by CVE-2026-11523?
How do I fix CVE-2026-11523?
No fix has been published for CVE-2026-11523 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-2026-11523 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11523 exists.
Sources
Also known as GHSA-pj5q-9vg7-6xmx.