CVE-2026-4493 Tenda A18 Pro MAC Filtering Configuration Endpoint setMacFilterCfg sub_423B50 stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the MAC filtering endpoint, potentially leading to code execution or denial of service.
- 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-2026-4493?
CVE-2026-4493 is a high-severity memory corruption vulnerability in Tenda A18 Pro, published on 20 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was determined in Tenda A18 Pro 02.03.02.28. The impacted element is the function sub_423B50 of the file /goform/setMacFilterCfg of the component MAC Filtering Configuration Endpoint. Executing a manipulation of the argument deviceList can lead to stack-based buffer overflow. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized.
Which versions are affected by CVE-2026-4493?
How do I fix CVE-2026-4493?
No fix has been published for CVE-2026-4493 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-2026-4493 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4493 exists.
Sources
Also known as GHSA-wvj3-4632-88jj.