CVE-2026-7747 Totolink N300RH Parameter cstecgi.cgi loginauth buffer overflow
Remote attackers can trigger a buffer overflow in the login authentication handler of Totolink N300RH routers, 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-2026-7747?
CVE-2026-7747 is a critical memory corruption vulnerability in Totolink N300RH, 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 N300RH 3.2.4-B20220812. Affected by this vulnerability is the function loginauth of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. Performing a manipulation of the argument Password results in buffer overflow. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks.
Which versions are affected by CVE-2026-7747?
How do I fix CVE-2026-7747?
No fix has been published for CVE-2026-7747 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-2026-7747 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7747 exists.
Sources
Also known as GHSA-jgvf-pm9w-mfrm.