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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.007 (52.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.002
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
- github.com/Bin4ry/yarbo-nat-in-my-back-yard (Exploit, Third Party Advisory, third-party-advisory)
- takeonme.org/gcves/GCVE-1337-2026-000000000000000000000000000000000000000000000… (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.