CVE-2021-3310

high

Description

Western Digital My Cloud OS 5 devices before 5.10.122 mishandle Symbolic Link Following on SMB and AFP shares. This can lead to code execution and information disclosure (by reading local files).

References

https://www.zerodayinitiative.com/advisories/ZDI-21-277/

https://www.westerndigital.com/support/productsecurity/wdc-21002-my-cloud-firmware-version-5-10-122

Details

Source: Mitre, NVD

Published: 2021-03-10

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.01145