What’s Vulnerable › Vulnerabilities

CVE-2025-59449

• Severity: medium (CVSS 4.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-06 · updated 2026-10-09
• Weakness: CWE-863

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

• YoSmart YoLink MQTT broker: through 2025-10-02

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

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