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CVE-2020-29563

31
FAUCET Score

CVE-2020-29563 describes an authentication bypass vulnerability affecting Western Digital My Cloud OS 5 devices prior to version 5.07.118, including several My Cloud NAS models. This critical vulnerability (CVSS 9.8) allows an unauthenticated attacker to gain full administrative access to the device over the network with low attack complexity, leading to complete compromise of confidentiality, integrity, and availability. Despite its severity, there is currently no public exploit code available, nor is there evidence of active exploitation or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.07.118CPE matchmatch criteria
cpe:2.3:o:westerndigital:my_cloud_os_5:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.89%
Probability of exploitation in next 30 days
EPSS Percentile
85.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0289 is in the 76th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

westerndigital.com / support/productsecurity/wdc-20010-my-cloud-os5-firmware-5-07-118
Vendor Advisory
zerodayinitiative.com / advisories/ZDI-20-1446
Third Party AdvisoryVDB Entry