EUVD-2026-28399
GHSA-vw42-99fw-3p5g
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionNVD
Yarbo firmware v2.3.9 contains hardcoded administrative credentials embedded in the firmware image. These credentials are identical across all devices running this firmware and cannot be changed or removed by end users, enabling trivial unauthorized access to device management interfaces by anyone who knows them.
AnalysisAI
Hardcoded administrative credentials in Yarbo firmware v2.3.9 allow remote unauthenticated attackers to gain full device administrative access across all deployed units. The CVSS 9.8 critical score reflects the complete lack of authentication barriers (AV:N/AC:L/PR:N), with identical credentials embedded in every device that cannot be changed by end users. …
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RemediationAI
Within 24 hours: Inventory all Yarbo devices running firmware v2.3.9 and isolate them from production networks if operationally feasible; contact Yarbo vendor for patch timeline and interim guidance. Within 7 days: Implement network segmentation to restrict Yarbo device management access to secured administrative networks only; deploy network-based monitoring for unauthorized administrative logins to affected devices. …
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External POC / Exploit Code
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