CVE-2026-51770

Description

Incorrect access control in the sendToMasterQosConfig function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to forward attacker-controlled QoS settings to the master via sending a crafted MQTT message to the cs_broker component..

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EPSS — Exploit Prediction

0.0064

Probability of exploitation

0.49%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://github.com/DarkBoulder/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md https://github.com/ShengWu00/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md https://www.totolink.net/ https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html

Frequently Asked Questions

What is CVE-2026-51770? +

Incorrect access control in the sendToMasterQosConfig function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to forward attacker-controlled QoS settings to the master via sending a crafted MQTT message to the cs_broker component..

How do I check if I'm vulnerable to CVE-2026-51770? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.