CVE-2025-4835 TOTOLINK A702R/A3002R/A3002RU HTTP POST Request formWlanRedirect buffer overflow
Remote attackers can trigger a buffer overflow in TOTOLINK routers via HTTP POST requests, 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-2025-4835?
CVE-2025-4835 is a high-severity memory corruption vulnerability in Totolink A3002r Firmware, published on 17 May 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was found in TOTOLINK A702R, A3002R and A3002RU 3.0.0-B20230809.1615. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file /boafrm/formWlanRedirect of the component HTTP POST Request Handler. The manipulation of the argument redirect-url leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2025-4835?
It affects 3 products.
Products include Totolink A3002r Firmware, Totolink A3002ru Firmware, Totolink A702r Firmware.
How do I fix CVE-2025-4835?
No fix has been published for CVE-2025-4835 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-2025-4835 being exploited?
There is no known exploitation of CVE-2025-4835 in the wild and no public exploit code.
Other vulnerabilities in Totolink A3002r Firmware
Sources
Also known as GHSA-h93j-5g7q-3xgg.