CVE-2026-51766 Missing authorization in n/a
Unauthenticated attackers can reboot TOTOLINK mesh routers and propagate reboots to slave devices via crafted MQTT messages, causing 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-2026-51766?
CVE-2026-51766 is a high-severity missing authorization vulnerability in n/a, published on 1 Sep 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 setDevReboot function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to reboot the local device and, on a master, fan out reboot commands to mesh slaves via sending a crafted MQTT message to the cs_broker component.
Weakness: CWE-284
Which versions are affected by CVE-2026-51766?
How do I fix CVE-2026-51766?
No fix has been published for CVE-2026-51766 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-2026-51766 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-51766 exists.
Sources
Also known as GHSA-f283-c9rp-m33q.