CVE-2026-90688 Tenda W20E HTTP formIPMacBindAdd stack-based overflow
A remote attacker can trigger a stack-based buffer overflow in the Tenda W20E router's HTTP handler, 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-2026-90688?
CVE-2026-90688 is a high-severity memory corruption vulnerability in Tenda W20E, published on 14 Sep 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 W20E 15.11.0.61068_1546_841_CN_TDC. This issue affects the function formIPMacBindAdd of the component HTTP Handler. Such manipulation of the argument IPMacBindRule leads to stack-based buffer overflow. It is possible to launch the attack remotely.
Which versions are affected by CVE-2026-90688?
How do I fix CVE-2026-90688?
No fix has been published for CVE-2026-90688 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-2026-90688 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90688 exists.
Sources
Also known as GHSA-xqq3-p9cq-5c28.