9.8

CVE-2020-28970: westerndigital my_cloud_os_5 Improper Authentication

CVSS: 9.8v3.1CriticalModified
Published 01-12-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-28970 is a critical (CVSS 9.8) Improper Authentication vulnerability in westerndigital my_cloud_os_5. EPSS estimates a 3.94% chance of exploitation in the next 30 days, higher than 90.2% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
3.94%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 01-12-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

An issue was discovered on Western Digital My Cloud OS 5 devices before 5.06.115. A NAS Admin authentication bypass vulnerability could allow an unauthenticated user to execute privileged commands on the device via a cookie. (In addition, an upload endpoint could then be used by an authenticated administrator to upload executable PHP scripts.)

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

3.94%

Chance of exploitation in the next 30 days

Percentile

90%

Versus all other CVEs

30-day change

0.00 pp

From 3.94% on 20-09-2026

20-09-202620-10-2026
EPSS score
3.94%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Westerndigital1 product

1 vendor · 1 product

References

3 links