CVE-2026-19822 Tenda W20E QoS Edit editQos lstAdd stack-based overflow
A remote attacker can trigger a stack-based buffer overflow in the QoS Edit function of the Tenda W20E router, 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-2026-19822?
CVE-2026-19822 is a high-severity memory corruption vulnerability in Tenda W20E, published on 14 Aug 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 15.11.0.6(1068_1546_841)_CN_TDC. This issue affects the function lstAdd of the file /goform/editQos of the component QoS Edit. Such manipulation of the argument qosListConnecttedNum leads to stack-based buffer overflow. The attack may be launched remotely. The exploit is publicly available and might be used.
Which versions are affected by CVE-2026-19822?
How do I fix CVE-2026-19822?
No fix has been published for CVE-2026-19822 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-2026-19822 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19822 exists.
Sources
Also known as GHSA-v76m-gv4x-96cp.