Auth bypass in Yarbo Firmware
CVE-2026-7415
The MQTT broker embedded in Yarbo firmware v2.3.9 is configured to allow anonymous connections with no topic-level read or write ACLs. Any host on the same network can subscribe to sensitive telemetry topics or publish control messages directly to the robot without authentication or authorization of any kind.
Vulnerability class: Broken Authentication
EPSS: 0.005 (43.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Yarbo Firmware — versions 0
- Yarbo Lawn_mower
- Yarbo Lawn_mower_firmware — versions 2.3.9
- Yarbo Lawn_mower_pro
- Yarbo Lawn_mower_pro_firmware — versions 2.3.9
Weakness classification (CWE)
References
- cve@takeonme.org (Exploit, Third Party Advisory, third-party-advisory)
- cve@takeonme.org (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-7415?
- CVE-2026-7415 is a critical-severity vulnerability in Yarbo Firmware, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-05-07.
- How severe is CVE-2026-7415?
- Critical severity. CVSS v3 base score is 9.8 out of 10.