CVE-2026-5567 Tenda M3 Destination setAdvPolicyData buffer overflow
Remote attackers can trigger a buffer overflow in the Tenda M3 router via the setAdvPolicyData function, potentially leading to code execution or service disruption.
- 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-2026-5567?
CVE-2026-5567 is a high-severity memory corruption vulnerability in Tenda M3, published on 5 Apr 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 M3 1.0.0.10. This vulnerability affects the function setAdvPolicyData of the file /goform/setAdvPolicyData of the component Destination Handler. Executing a manipulation of the argument policyType can lead to buffer overflow. The attack can be executed remotely. The exploit has been published and may be used.
Which versions are affected by CVE-2026-5567?
It affects 1 product.
Products include Tenda M3 Firmware.
How do I fix CVE-2026-5567?
No fix has been published for CVE-2026-5567 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-2026-5567 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5567 exists.
Other vulnerabilities in Tenda M3
Sources
Also known as GHSA-jwvm-hq84-h9cj.