How severe is CVE-2021-35941?

CVE-2021-35941 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-35941 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-35941?

CVE-2021-35941 primarily affects Westerndigital Wd My Book Live Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-35941?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-35941 published?

CVE-2021-35941 was published on 2021-06-29 and last updated on 2026-06-17.

CVE-2021-35941

CVE-2021-35941 is a high-severity vulnerability in Westerndigital Wd My Book Live Firmware with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 13% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-306.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 13% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Westerndigital Wd My Book Live Firmware
Published: 2021-06-29
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-35941?: 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.
How severe is CVE-2021-35941?: CVE-2021-35941 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-35941 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-35941?: CVE-2021-35941 primarily affects Westerndigital Wd My Book Live Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-35941?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-35941 published?: CVE-2021-35941 was published on 2021-06-29 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:westerndigital:wd_my_book_live_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:westerndigital:wd_my_book_live_duo_firmware:*:*:*:*:*:*:*:*

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