Vulnerability · Published Oct 6, 2025 · Assigned by mitre
CVE-2025-59449
Medium 4.9
In plain English
A medium-severity incorrect authorization in YoLink MQTT broker from YoSmart. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).
Official description
The YoSmart YoLink MQTT broker through 2025-10-02 does not enforce sufficient authorization controls to prevent cross-account attacks, allowing an attacker to remotely operate affected devices if the attacker obtains the associated device IDs. Because YoLink device IDs are predictable, an attacker can exploit this to gain full control over any other YoLink user's devices.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| YoSmart | YoLink MQTT broker | 0 – through 2025-10-02 |
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N