CVE-2025-59449

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.

CVSS 3.1

4.9CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 20% of CVEs (scores of 2026-10-25)

CWE

CWE-863

Published

2025-10-06

Modified

2026-10-09

Record from

the NVD, synced 2026-10-19

References

• https://bishopfox.com/blog/advisories
• https://bishopfox.com/blog/how-a-20-smart-device-gave-me-access-to-your-home
• https://shop.yosmart.com/pages/product-support
• https://shop.yosmart.com/pages/sa-2025-001

Check your stackJSON