CVE-2021-36226

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 do not use cryptographically signed Firmware upgrade files.

*Credits: N/A

CVSS Scores

NISTv3.1 9.8

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

* 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
2024-09-13 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-347: Improper Verification of Cryptographic Signature

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