CVE-2026-51619 Missing authorization in n/a
Unauthenticated attackers can obtain online client information from TOTOLINK T6 routers by sending a crafted POST request to a specific CGI endpoint.
- 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-2026-51619?
CVE-2026-51619 is a high-severity missing authorization vulnerability in n/a, published on 28 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Incorrect access control in the getOnlineClient function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain online client information via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
Weakness: CWE-284
Which versions are affected by CVE-2026-51619?
How do I fix CVE-2026-51619?
No fix has been published for CVE-2026-51619 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-51619 being exploited?
There is no known exploitation of CVE-2026-51619 in the wild and no public exploit code.
Sources
Also known as GHSA-q4r7-ff4v-586q.