CVE-2021-36224

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Western Digital My Cloud devices before OS5 have a nobody account with a blank password.

*Credits: N/A

CVSS Scores

NISTv3.1 9.8
Tenablev2 10.0

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-07-08 CVE Reserved
2023-02-06 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-798: Use of Hard-coded Credentials

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC
https://github.com/pedrib/PoC/blob/master/advisories/Pwn2Own/Tokyo_2020/weekend_destroyer/weekend_destroyer.md	2024-08-04
https://krebsonsecurity.com/2021/07/another-0-day-looms-for-many-western-digital-users	2024-08-04
https://www.youtube.com/watch?v=vsg9YgvGBec	2024-08-04

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Westerndigital Search vendor "Westerndigital"	My Cloud Os Search vendor "Westerndigital" for product "My Cloud Os"	< 5.02.104 Search vendor "Westerndigital" for product "My Cloud Os" and version " < 5.02.104"	-	Affected	in	Westerndigital Search vendor "Westerndigital"	My Cloud Pr4100 Search vendor "Westerndigital" for product "My Cloud Pr4100"	-	-	Safe