CVE-2026-7719 Totolink WA300 POST Request cstecgi.cgi loginauth buffer overflow
Remote attackers can trigger a buffer overflow in the WA300 router's login handler via a crafted POST request, potentially leading to code execution or service disruption.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-7719?
CVE-2026-7719 is a critical memory corruption vulnerability in Totolink WA300, published on 4 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A security flaw has been discovered in Totolink WA300 5.2cu.7112_B20190227. The affected element is the function loginauth of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument http_host results in buffer overflow. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks.
Which versions are affected by CVE-2026-7719?
How do I fix CVE-2026-7719?
No fix has been published for CVE-2026-7719 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-2026-7719 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7719 exists.
Sources
Also known as GHSA-v55v-fw68-5qvj.