title: Authentication Bypass issue in My Cloud OS 5 devices
description: An authentication bypass issue via spoofing was discovered in the token-based authentication mechanism that could allow an attacker to carry out an impersonation attack.
This issue affects My Cloud OS 5 devices: before 5.26.202.
problem types: CWE-290 Authentication Bypass by Spoofing
affected:
{
defaultStatus: unaffected
platforms: Linux
product: My Cloud OS 5
vendor: Western Digital
versions:
lessThan: 5.26.202, status: affected, version: 0, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 10
baseSeverity: CRITICAL
confidentialityImpact: NONE
integrityImpact: HIGH
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL
solutions: Western Digital recommends that users promptly update their devices to the latest firmware by clicking on the firmware update notification.