CVE-2026-85031 TOTOLINK CP450 cstecgi.cgi buffer overflow
Remote attackers can trigger a buffer overflow in the CP450 web interface via the topicurl parameter, 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-2026-85031?
CVE-2026-85031 is a critical memory corruption vulnerability in TOTOLINK CP450, published on 3 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was found in TOTOLINK CP450 4.1.0. The impacted element is an unknown function of the file /cgi-bin/cstecgi.cgi. Performing a manipulation of the argument topicurl results in buffer overflow. Remote exploitation of the attack is possible.
Which versions are affected by CVE-2026-85031?
How do I fix CVE-2026-85031?
No fix has been published for CVE-2026-85031 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-2026-85031 being exploited?
There is no known exploitation of CVE-2026-85031 in the wild and no public exploit code.
Sources
Also known as GHSA-xjrp-q25x-8wpw.