Impersonation attack causing an Authentication Bypass on Western Digital devices
Western Digital My Cloud, My Cloud Home, My Cloud Home Duo, and SanDisk ibi devices were vulnerable to an impersonation attack that could allow an unauthenticated attacker to gain access to user data. This issue affects My Cloud OS 5 devices: before 5.25.132; My Cloud Home and My Cloud Home Duo: before 8.13.1-102; SanDisk ibi: before 8.13.1-102.
- Published
- Jun 12, 2023
- Updated
- Jun 17, 2026
- EPSS
- 0.6% · 46th percentile
- CWE
- CWE-290
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Report tools
Action score
30
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.6%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 7.5
- CNA · WDC PSIRT
- 10.0
- 2.5 point gap
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| westerndigital | my cloud pr2100 firmware | cpe:2.3:o:westerndigital:my_cloud_pr2100_firmware |
| westerndigital | my cloud pr2100 | cpe:2.3:h:westerndigital:my_cloud_pr2100 |
| westerndigital | my cloud pr4100 firmware | cpe:2.3:o:westerndigital:my_cloud_pr4100_firmware |
| westerndigital | my cloud pr4100 | cpe:2.3:h:westerndigital:my_cloud_pr4100 |
| westerndigital | my cloud ex4100 firmware | cpe:2.3:o:westerndigital:my_cloud_ex4100_firmware |
| westerndigital | my cloud ex4100 | cpe:2.3:h:westerndigital:my_cloud_ex4100 |
| westerndigital | my cloud ex2 ultra firmware | cpe:2.3:o:westerndigital:my_cloud_ex2_ultra_firmware |
| westerndigital | my cloud ex2 ultra | cpe:2.3:h:westerndigital:my_cloud_ex2_ultra |
| westerndigital | my cloud mirror g2 firmware | cpe:2.3:o:westerndigital:my_cloud_mirror_g2_firmware |
| westerndigital | my cloud mirror g2 | cpe:2.3:h:westerndigital:my_cloud_mirror_g2 |
| westerndigital | my cloud dl2100 firmware | cpe:2.3:o:westerndigital:my_cloud_dl2100_firmware |
| westerndigital | my cloud dl2100 | cpe:2.3:h:westerndigital:my_cloud_dl2100 |
and 12 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- westerndigital my cloud dl2100 firmwarebefore 5.25.132
- westerndigital my cloud dl4100 firmwarebefore 5.25.132
- westerndigital my cloud ex2 ultra firmwarebefore 5.25.132
- westerndigital my cloud ex2100 firmwarebefore 5.25.132
- westerndigital my cloud ex4100 firmwarebefore 5.25.132
- westerndigital my cloud firmwarebefore 5.25.132
- westerndigital my cloud home duo firmwarebefore 8.13.1-102
- westerndigital my cloud home firmwarebefore 8.13.1-102
- westerndigital my cloud mirror g2 firmwarebefore 5.25.132
- westerndigital my cloud pr2100 firmwarebefore 5.25.132
- westerndigital my cloud pr4100 firmwarebefore 5.25.132
- westerndigital sandisk ibi firmwarebefore 8.13.1-102
Versions reported by the vendor
Affected version ranges reported by the assigning authority (WDC PSIRT). Independent of NVD's CPE analysis and usually ahead of it.
SanDisk ibi
- before 8.13.1-102affected
Western Digital My Cloud Home and My Cloud Home Duo
- before 8.13.1-102affected
Western Digital My Cloud OS 5
- before 5.25.132affected
Same product
westerndigital: all recordsOther highest-scoring records for the same primary product.
- CVE-2022-29844Western Digital My Cloud OS 5 arbitrary file read and write vulnerability via ftp50Plan
- CVE-2022-22995Western Digital My Cloud OS 5 and My Cloud Home Unauthenticated Arbitrary File Write Vulnerability in Netatalk40Plan
- CVE-2022-29843Western Digital My Cloud OS 5 devices Command Injection Vulnerability39Monitor
- CVE-2022-23000Weak Default SSL use in Port Forwarding Service31Monitor
- CVE-2023-22817Server-side Request Forgery vulnerability in Western Digital My Cloud, My Cloud Home and SanDisk ibi products22Monitor
- CVE-2022-22999Cross-site Scripting Vulnerability in USB Backups App19Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-290 · Authentication Bypass by SpoofingCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Exploitation of Trusted IdentifiersCAPEC-21likelihood: High · High
- Exploiting Trust in ClientCAPEC-22likelihood: High · High
- Creating a Rogue Certification Authority CertificateCAPEC-459likelihood: Medium · Very High
- Web Services API Signature Forgery Leveraging Hash Function Extension WeaknessCAPEC-461High
- Signature SpoofCAPEC-473
- Signature Spoofing by MisrepresentationCAPEC-476likelihood: Low · High
- Session Credential Falsification through PredictionCAPEC-59likelihood: High · High
- Reusing Session IDs (aka Session Replay)CAPEC-60likelihood: High · High
ATT&CK techniques
- Masquerading: Invalid Code SignatureT1036.001
- Access Token ManipulationT1134
- Access Token Manipulation:Token Impersonation/TheftT1134.001
- Steal Application Access TokenT1528
- Steal Web Session CookieT1539
- Use Alternate Authentication Material:Web Session CookieT1550.004
- Subvert Trust Controls: Code SigningT1553.002
- Adversary-in-the-MiddleT1557
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- https://www.westerndigital.com/support/product-security/wdc-22020-my-cloud-os-5-my-cloud-home-ibi-firmware-update
- www.westerndigital.com/support/product-security/wdc-22020-my-cloud-os-5-my-cloud-home-ibi-firmware-update
Vendor advisories and official records. Exploit/PoC links are deliberately left out.