Description
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.
Affected products
yarbo: lawn mower firmware; yarbo: lawn mower; yarbo: lawn mower pro firmware; yarbo: lawn mower pro
References3
- github.com/Bin4ry/yarbo-nat-in-my-back-yard ExploitThird Party Advisory
- github.com/Bin4ry/yarbo-nat-in-my-back-yard ExploitThird Party Advisory
- takeonme.org/gcves/GCVE-1337-2026-00000000000000000000000000000… Third Party Advisory
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 46 · as of 13 November 2026
- CWE
- CWE-306
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