Persistent undocumented backdoor access in Yarbo robot

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Summary

CVECVE-2026-7413
StatePUBLISHED
AssignerAHA
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-07 17:15:59 UTC
Updated2026-05-14 17:54:50 UTC
DescriptionA hidden, persistent backdoor was found in Yarbo firmware v2.3.9 that provides remote, unauthenticated (or weakly authenticated) access to privileged functionality. The backdoor is undocumented, cannot be disabled via user-facing settings, and survives factory reset and ordinary firmware updates.

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: 0.000170000 probability, percentile 0.046470000 (date 2026-05-25)

Problem Types: CWE-912 | NVD-CWE-noinfo | CWE-912 CWE-912 Hidden Functionality

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1[email protected]Secondary7.2HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS7.2HIGHCVSS:3.1/AV:N/AC:L/PR:H/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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Yarbo Lawn Mower - All All All
Operating System Yarbo Lawn Mower Firmware 2.3.9 All All All
Hardware Yarbo Lawn Mower Pro - All All All
Operating System Yarbo Lawn Mower Pro Firmware 2.3.9 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Yarbo Firmware affected 2.3.9 semver Not specified

References

ReferenceSourceLinkTags
takeonme.org/cves/cve-2026-7413 134c704f-9b21-4f2e-91b3-4a467353bcc0 takeonme.org Third Party Advisory
github.com/Bin4ry/yarbo-nat-in-my-back-yard [email protected] github.com Exploit, Third Party Advisory
takeonme.org/gcves/GCVE-1337-2026-0000000000000000000000000000000000000000... [email protected] takeonme.org Third Party Advisory
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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