CVE-2026-10191 Tenda W12 httpd cgiWifiMacFilterSet stack-based overflow
A remote attacker can trigger a stack-based buffer overflow in the Tenda W12 router's httpd service via the cgiWifiMacFilterSet function, 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-2026-10191?
CVE-2026-10191 is a high-severity memory corruption vulnerability in Tenda W12, published on 31 May 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 W12 3.0.0.7(4763). Impacted is the function cgiWifiMacFilterSet of the file /bin/httpd. This manipulation of the argument wifiMacFilterSet.macList.mac causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized.
Which versions are affected by CVE-2026-10191?
How do I fix CVE-2026-10191?
No fix has been published for CVE-2026-10191 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-2026-10191 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-10191 exists.
Sources
Also known as GHSA-w35x-2v63-7ggc.