What is the severity of ZDI-CAN-15888?

The severity of ZDI-CAN-15888 is high as it allows authentication bypass for network-adjacent attackers.

How do I fix ZDI-CAN-15888?

To fix ZDI-CAN-15888, update the firmware of your Western Digital MyCloud PR4100 to the latest version provided by the vendor.

Who is affected by ZDI-CAN-15888?

ZDI-CAN-15888 affects installations of Western Digital MyCloud PR4100 that have the vulnerable nasAdmin service running.

Can ZDI-CAN-15888 be exploited remotely?

ZDI-CAN-15888 cannot be exploited remotely as it requires network-adjacency to execute the attack.

What is the nature of the vulnerability in ZDI-CAN-15888?

The nature of the vulnerability in ZDI-CAN-15888 lies in the failure of the nasAdmin service to enforce authentication.

Vulnerability/
ZDI-CAN-15888

medium

6.3

30/1/2025

ZDI-CAN-15888: (Pwn2Own) Western Digital MyCloud PR4100 nasAdmin Authentication Bypass Vulnerability

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of Western Digital MyCloud PR4100. Authentication is not required to exploit this vulnerability. The specific flaw exists within the nasAdmin service, which listens on TCP ports 80 and 443 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this vulnerability to bypass authentication on the system.

Affected Software	Affected Version	How to fix
Western Digital My Cloud PR4100

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Reference Links

Frequently Asked Questions

What is the severity of ZDI-CAN-15888?
The severity of ZDI-CAN-15888 is high as it allows authentication bypass for network-adjacent attackers.
How do I fix ZDI-CAN-15888?
To fix ZDI-CAN-15888, update the firmware of your Western Digital MyCloud PR4100 to the latest version provided by the vendor.
Who is affected by ZDI-CAN-15888?
ZDI-CAN-15888 affects installations of Western Digital MyCloud PR4100 that have the vulnerable nasAdmin service running.
Can ZDI-CAN-15888 be exploited remotely?
ZDI-CAN-15888 cannot be exploited remotely as it requires network-adjacency to execute the attack.
What is the nature of the vulnerability in ZDI-CAN-15888?
The nature of the vulnerability in ZDI-CAN-15888 lies in the failure of the nasAdmin service to enforce authentication.

agent/references
agent/softwarecombine
agent/severity
agent/title
agent/type
agent/description
agent/event
agent/source
agent/tags
collector/zdi-advisory
source/ZDI
alias/ZDI-22-347
alias/ZDI-CAN-15888
alias/CVE-2022-22990
agent/software-canonical-lookup
agent/software-canonical-lookup-request
vendor/western digital
canonical/western digital my cloud pr4100

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Frequently Asked Questions

What is the severity of ZDI-CAN-15888?
The severity of ZDI-CAN-15888 is high as it allows authentication bypass for network-adjacent attackers.
How do I fix ZDI-CAN-15888?
To fix ZDI-CAN-15888, update the firmware of your Western Digital MyCloud PR4100 to the latest version provided by the vendor.
Who is affected by ZDI-CAN-15888?
ZDI-CAN-15888 affects installations of Western Digital MyCloud PR4100 that have the vulnerable nasAdmin service running.
Can ZDI-CAN-15888 be exploited remotely?
ZDI-CAN-15888 cannot be exploited remotely as it requires network-adjacency to execute the attack.
What is the nature of the vulnerability in ZDI-CAN-15888?
The nature of the vulnerability in ZDI-CAN-15888 lies in the failure of the nasAdmin service to enforce authentication.