CVE-2020-27159

CRITICAL

9.8

CVSS Score

Published: October 27, 2020 at 07:51 PM UTC

Updated: June 17, 2026 at 03:08 AM UTC

7 products affected across 1 vendorMy Cloud FirmwareMy CloudMy Cloud PR4100

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Severity

CRITICAL9.8

Exploit prediction

EPSS 6%

Description

Addressed remote code execution vulnerability in DsdkProxy.php due to insufficient sanitization and insufficient validation of user input in Western Digital My Cloud NAS devices prior to 5.04.114

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

My Cloud Firmware · Westerndigital

95%

v < 5.04.114

Affected range stops below 5.04.114, so it looks safe — our inference, not a vendor statement

My Cloud · Westerndigital

90%

v < 5.04.114

Affected range stops below 5.04.114, so it looks safe — our inference, not a vendor statement

westerndigital-my-cloud-ex4100 (same device) · westerndigital-my-cloud-expert-series-ex2 (same device) · westerndigital-my-cloud-mirror-gen-2 (same device) · westerndigital-my-cloud-pr2100 (same device) · westerndigital-my-cloud-pr4100 (same device)

My Cloud EX4100 · Westerndigitaldevice

80%

All versions

My Cloud Expert Series Ex2 · Westerndigitaldevice

80%

All versions

My Cloud Mirror Gen 2 · Westerndigitaldevice

80%

All versions

My Cloud PR2100 · Westerndigitaldevice

80%

All versions