What is the severity of ZDI-CAN-12214?

The vulnerability ZDI-CAN-12214 is classified as high severity due to its potential for authentication bypass.

How do I fix ZDI-CAN-12214?

To fix ZDI-CAN-12214, update the firmware of the Western Digital MyCloud PR4100 to the latest version available.

Who is affected by ZDI-CAN-12214?

The vulnerability ZDI-CAN-12214 affects installations of Western Digital MyCloud PR4100 by allowing network-adjacent attackers to bypass authentication.

Can ZDI-CAN-12214 be exploited remotely?

No, ZDI-CAN-12214 requires network adjacency to exploit the vulnerability, meaning the attacker must be on the same local network.

What should I do if I cannot update my device to mitigate ZDI-CAN-12214?

If you cannot update your device, consider isolating the Western Digital MyCloud PR4100 from the network to limit exposure to potential attackers.

Vulnerability/
ZDI-CAN-12214

medium

5.4

30/1/2025

ZDI-CAN-12214: (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. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the nasAdmin service, which listens on TCP port 80 and 443 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this vulnerability to execute arbitrary code in the context of root.

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

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Frequently Asked Questions

What is the severity of ZDI-CAN-12214?
The vulnerability ZDI-CAN-12214 is classified as high severity due to its potential for authentication bypass.
How do I fix ZDI-CAN-12214?
To fix ZDI-CAN-12214, update the firmware of the Western Digital MyCloud PR4100 to the latest version available.
Who is affected by ZDI-CAN-12214?
The vulnerability ZDI-CAN-12214 affects installations of Western Digital MyCloud PR4100 by allowing network-adjacent attackers to bypass authentication.
Can ZDI-CAN-12214 be exploited remotely?
No, ZDI-CAN-12214 requires network adjacency to exploit the vulnerability, meaning the attacker must be on the same local network.
What should I do if I cannot update my device to mitigate ZDI-CAN-12214?
If you cannot update your device, consider isolating the Western Digital MyCloud PR4100 from the network to limit exposure to potential attackers.

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-20-1445
alias/ZDI-CAN-12214
alias/CVE-2020-28940
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-12214?
The vulnerability ZDI-CAN-12214 is classified as high severity due to its potential for authentication bypass.
How do I fix ZDI-CAN-12214?
To fix ZDI-CAN-12214, update the firmware of the Western Digital MyCloud PR4100 to the latest version available.
Who is affected by ZDI-CAN-12214?
The vulnerability ZDI-CAN-12214 affects installations of Western Digital MyCloud PR4100 by allowing network-adjacent attackers to bypass authentication.
Can ZDI-CAN-12214 be exploited remotely?
No, ZDI-CAN-12214 requires network adjacency to exploit the vulnerability, meaning the attacker must be on the same local network.
What should I do if I cannot update my device to mitigate ZDI-CAN-12214?
If you cannot update your device, consider isolating the Western Digital MyCloud PR4100 from the network to limit exposure to potential attackers.