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Vulnerability record · CVE-2021-35941 · published 29 June 2021

CVE-2021-35941: Westerndigital wd my book live firmware missing authentication for critical function vulnerability

Westerndigital · Wd My Book Live Firmware

Western Digital WD My Book Live (2.x and later) and WD My Book Live Duo (all versions) have an administrator API that can perform a system factory restore without authentication, as exploited in the wild in June 2021, a different vulnerability than CVE-2018-18472.

7.5 CVSS 3.1 High EPSS 13% · top 3.9% CWE-306 · Missing authentication for critical function
7.5CVSS 3.1 base score, v2 5.0
13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Western Digital WD My Book Live (2.x and later) and WD My Book Live Duo (all versions) have an administrator API that can perform a system factory restore without authentication, as exploited in the wild in June 2021, a different vulnerability than CVE-2018-18472.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://arstechnica.com/gadgets/2021/06/hackers-exploited-0-day-not-2018-bug-to-mass-wipe-my-book-live-devices/ ExploitThird Party Advisory
https://www.westerndigital.com/support/productsecurity/wdc-21008-recommended-security-measures-wd-mybooklive-wd-mybookli Vendor Advisory
https://arstechnica.com/gadgets/2021/06/hackers-exploited-0-day-not-2018-bug-to-mass-wipe-my-book-live-devices/ ExploitThird Party Advisory
https://www.westerndigital.com/support/productsecurity/wdc-21008-recommended-security-measures-wd-mybooklive-wd-mybookli Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-35941), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.