CVE-2025-12211 Tenda O3 setDmzInfo GetValue stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the Tenda O3 router's DMZ configuration interface, 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-2025-12211?
CVE-2025-12211 is a high-severity memory corruption vulnerability in Tenda O3, published on 27 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A security flaw has been discovered in Tenda O3 1.0.0.10(2478). Affected by this issue is the function SetValue/GetValue of the file /goform/setDmzInfo. The manipulation of the argument dmzIP results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks.
Which versions are affected by CVE-2025-12211?
It affects 1 product.
Products include Tenda O3 Firmware1.0.0.10\(2478\).
How do I fix CVE-2025-12211?
No fix has been published for CVE-2025-12211 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-2025-12211 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-12211 exists.
Other vulnerabilities in Tenda O3
- CVE-2025-12209 Tenda O3 setDhcpConfig GetValue stack-based overflow
- CVE-2025-12210 Tenda O3 AdvSetLanip GetValue stack-based overflow
- CVE-2025-12212 Tenda O3 setNetworkService GetValue stack-based overflow
- CVE-2025-12213 Tenda O3 setVlanConfig GetValue stack-based overflow
- CVE-2025-12214 Tenda O3 sysAutoReboot GetValue stack-based overflow
Sources
Also known as GHSA-5rcg-7jx4-f3xr.