Open MQTT orchestration without read/write ACLs in Yarbo robot firmware

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Summary

CVECVE-2026-7415
StatePUBLISHED
AssignerAHA
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-07 17:15:59 UTC
Updated2026-05-07 18:46:25 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

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

EPSS: 0.000350000 probability, percentile 0.102120000 (date 2026-05-08)

Problem Types: CWE-306 | CWE-306 CWE-306 Missing authentication for critical function

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Yarbo Firmware affected 2.3.9 semver Not specified

References

ReferenceSourceLinkTags
takeonme.org/gcves/GCVE-1337-2026-0000000000000000000000000000000000000000... [email protected] takeonme.org
github.com/Bin4ry/yarbo-nat-in-my-back-yard 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Andreas Makris (aka Bin4ry) (en)

CNA: todb of AHA! (en)

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