HOMEVULNERABILITIESCVE-2020-28971
CRITICAL

CVE-2020-28971

CWE-287Published: December 1, 2020· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official 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, because of insufficient validation of URI paths.

NVD Source

Technical Analysis

CVE-2020-28971 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

westerndigital6 product(s)
my cloud os 5my cloud ex2 ultramy cloud ex4100my cloud mirror gen 2my cloud pr2100my cloud pr4100
Source: NVD CPE · 6 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://support.wdc.com/downloads.aspx?g=907&lang=en#downloads
PATCHhttps://support.wdc.com/downloads.aspx?g=907&lang=en#downloads
ADVISORYhttps://www.westerndigital.com/support/productsecurity/wdc-20009-os5-firmware-5-06-115
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-20-1447/
ADVISORYhttps://www.westerndigital.com/support/productsecurity/wdc-20009-os5-firmware-5-06-115
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-20-1447/

All References (6)

→
https://support.wdc.com/downloads.aspx?g=907&lang=en#downloadsPatch · Vendor Advisory
→
https://www.westerndigital.com/support/productsecurity/wdc-20009-os5-firmware-5-06-115Vendor Advisory
→
https://www.zerodayinitiative.com/advisories/ZDI-20-1447/Third Party Advisory · VDB Entry
→
https://support.wdc.com/downloads.aspx?g=907&lang=en#downloadsPatch · Vendor Advisory
→
https://www.westerndigital.com/support/productsecurity/wdc-20009-os5-firmware-5-06-115Vendor Advisory
→
https://www.zerodayinitiative.com/advisories/ZDI-20-1447/Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2020-28971
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-287
CISA KEVNo
Affected1 vendor(s)
PublishedDec 1, 2020

Related CVEs (CWE-287)

CVE-2008-3703
10.0
CVE-2008-2528
10.0
CVE-2008-3411
10.0
CVE-2008-1154
10.0
CVE-2008-1268
10.0
CVE-2008-3466
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-28971 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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