CVE-2026-10189 Tenda W12 httpd cgiSysTimeInfoSet stack-based overflow
A remote attacker can trigger a stack-based buffer overflow in the Tenda W12 router's httpd service via the cgiSysTimeInfoSet 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-2026-10189?
CVE-2026-10189 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 has been found in Tenda W12 3.0.0.7(4763). This vulnerability affects the function cgiSysTimeInfoSet of the file /bin/httpd. The manipulation of the argument sec leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2026-10189?
How do I fix CVE-2026-10189?
No fix has been published for CVE-2026-10189 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-2026-10189 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-10189 exists.
Sources
Also known as GHSA-r38j-2xmx-6hwh.