CVE-2025-7837 TOTOLINK T6 MQTT Service recvSlaveStaInfo buffer overflow
Remote attackers can trigger a buffer overflow in the MQTT service of TOTOLINK T6 devices, 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-2025-7837?
CVE-2025-7837 is a high-severity memory corruption vulnerability in TOTOLINK T6, published on 19 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 TOTOLINK T6 4.1.5cu.748_B20211015 and classified as critical. Affected by this issue is the function recvSlaveStaInfo of the component MQTT Service. The manipulation of the argument dest leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2025-7837?
It affects 1 product.
Products include Totolink T6 Firmware.
How do I fix CVE-2025-7837?
No fix has been published for CVE-2025-7837 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-2025-7837 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7837 exists.
Other vulnerabilities in TOTOLINK T6
Sources
Also known as GHSA-qxfq-qf96-fww5.