CVE-2025-7420 Tenda O3V2 httpd setWrlBasicInfo formWifiBasicSet stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the Tenda O3V2 router's httpd service via the extChannel parameter, 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-2025-7420?
CVE-2025-7420 is a high-severity memory corruption vulnerability in Tenda O3V2, published on 10 Jul 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was found in Tenda O3V2 1.0.0.12(3880). It has been declared as critical. This vulnerability affects the function formWifiBasicSet of the file /goform/setWrlBasicInfo of the component httpd. The manipulation of the argument extChannel leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2025-7420?
It affects 1 product.
Products include Tenda O3 Firmware.
How do I fix CVE-2025-7420?
No fix has been published for CVE-2025-7420 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-2025-7420 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7420 exists.
Other vulnerabilities in Tenda O3V2
- CVE-2025-55613 Memory corruption in n/a
- CVE-2024-36604 Command injection in n/a
- CVE-2025-7421 Tenda O3V2 httpd operateMacFilter fromMacFilterModify stack-based overflow
- CVE-2025-7422 Tenda O3V2 httpd setNetworkService setAutoReboot stack-based overflow
- CVE-2025-7423 Tenda O3V2 httpd setWrlFilterList formWifiMacFilterSet stack-based overflow
Sources
Also known as GHSA-8c53-8w7h-674f.