CVE-2025-6393 TOTOLINK A702R/A3002R/A3002RU/EX1200T HTTP POST Request formIPv6Addr buffer overflow
Remote attackers can trigger a buffer overflow in TOTOLINK routers via HTTP POST requests, 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-2025-6393?
CVE-2025-6393 is a high-severity memory corruption vulnerability in Totolink A3002r Firmware, published on 21 Jun 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, A3002RU and EX1200T 3.0.0-B20230809.1615/4.0.0-B20230531.1404/4.0.0-B20230721.1521/4.1.2cu.5232_B20210713. It has been classified as critical. Affected is an unknown function of the file /boafrm/formIPv6Addr of the component HTTP POST Request Handler. The manipulation of the argument submit-url leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2025-6393?
It affects 4 products.
Products include Totolink A3002r Firmware, Totolink A3002ru Firmware, Totolink A702r Firmware, Totolink Ex1200t Firmware.
How do I fix CVE-2025-6393?
No fix has been published for CVE-2025-6393 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-2025-6393 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-6393 exists.
Other vulnerabilities in Totolink A3002r Firmware
Sources
Also known as GHSA-6xw8-jh6q-85g8.