CVE-2021-36225

HIGHNVD 8.88.8—

8.8

Western Digital My Cloud devices before OS5 allow REST API access by low-privileged accounts, as demonstrated by API commands for firmware uploads and installation.

CVSS v3: 8.8
EG Score: 8.8(medium)
EPSS: 58.3%
KEV: Not listed

Published

February 6, 2023

Last Modified

March 26, 2025

References (6)

cve@mitrehttps://github.com/pedrib/PoC/blob/master/advisories/Pwn2Own/Tokyo_2020/weekend_destroyer/weekend_destroyer.md
cve@mitrehttps://krebsonsecurity.com/2021/07/another-0-day-looms-for-many-western-digital-users/
cve@mitrehttps://www.youtube.com/watch?v=vsg9YgvGBec
af854a3a-2127-422b-91ae-364da2661108https://github.com/pedrib/PoC/blob/master/advisories/Pwn2Own/Tokyo_2020/weekend_destroyer/weekend_destroyer.md
af854a3a-2127-422b-91ae-364da2661108https://krebsonsecurity.com/2021/07/another-0-day-looms-for-many-western-digital-users/
af854a3a-2127-422b-91ae-364da2661108https://www.youtube.com/watch?v=vsg9YgvGBec

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:10 UTCepss_batch
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2026-06-02 20:11 UTCepss_batch
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2026-05-29 13:42 UTCepss_batch
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2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2021-36225?

CVE-2021-36225 is a high vulnerability published on February 6, 2023. Western Digital My Cloud devices before OS5 allow REST API access by low-privileged accounts, as demonstrated by API commands for firmware uploads and installation.

When was CVE-2021-36225 disclosed?

CVE-2021-36225 was first published in the National Vulnerability Database on February 6, 2023, with the most recent update on March 26, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-36225 actively exploited?

CVE-2021-36225 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 58.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-36225?

CVE-2021-36225 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2021-36225?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-36225, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-36225

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(2)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-36225?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (6)

Frequently asked(5)

Related CVEs(same CWE)