CVE-2026-51722 Missing authorization in n/a
Unauthenticated attackers can repoint the TOTOLINK T6 router to a malicious upstream Wi-Fi network via a crafted POST request.
- 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-2026-51722?
CVE-2026-51722 is a critical missing authorization vulnerability in n/a, published on 31 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 setWiFiRepeaterCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to repoint the device to an attacker-controlled upstream Wi-Fi via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
Weakness: CWE-284
Which versions are affected by CVE-2026-51722?
How do I fix CVE-2026-51722?
No fix has been published for CVE-2026-51722 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-2026-51722 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-51722 exists.
Sources
Also known as GHSA-g2w6-f26f-58pr.