Western Digital My Cloud Cloud, Mirror Gen2, EX2 Ultra, EX2100, EX4100, DL2100, DL4100…
Priority MEDIUM 44CWE-59Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA.
Summary
Western Digital My Cloud Cloud, Mirror Gen2, EX2 Ultra, EX2100, EX4100, DL2100, DL4100, PR2100 and PR4100 before firmware 2.31.183 are affected by a code execution (as root, starting from a low-privilege user session) vulnerability. The cgi-bin/webfile_mgr.cgi file allows arbitrary file write by abusing symlinks. Specifically, this occurs by uploading a tar archive that contains a symbolic link, then uploading another archive that writes a file to the link using the "cgi_untar" command. Other commands might also be susceptible. Code can be executed because the "name" parameter passed to the cgi_unzip command is not sanitized.
Why it matters now
EPSS 0.02996 87th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 18
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:westerndigital:my_cloud_firmware:*:*:*:*:*:*:*:* | before 2.31.183 | Vulnerable | Westerndigital |
| cpe:2.3:h:westerndigital:my_cloud:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Westerndigital |
| cpe:2.3:o:westerndigital:my_cloud_mirror_gen2_firmware:*:*:*:*:*:*:*:* | before 2.31.183 | Vulnerable | Westerndigital |
| cpe:2.3:h:westerndigital:my_cloud_mirror_gen2:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Westerndigital |
| cpe:2.3:o:westerndigital:my_cloud_ex2_ultra_firmware:*:*:*:*:*:*:*:* | before 2.31.183 | Vulnerable | Westerndigital |
| cpe:2.3:h:westerndigital:my_cloud_ex2_ultra:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Westerndigital |
| cpe:2.3:o:westerndigital:my_cloud_ex2100_firmware:*:*:*:*:*:*:*:* | before 2.31.183 | Vulnerable | Westerndigital |
| cpe:2.3:h:westerndigital:my_cloud_ex2100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Westerndigital |
| cpe:2.3:o:westerndigital:my_cloud_ex4100_firmware:*:*:*:*:*:*:*:* | before 2.31.183 | Vulnerable | Westerndigital |
| cpe:2.3:h:westerndigital:my_cloud_ex4100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Westerndigital |
- cpe:2.3:o:westerndigital:my_cloud_firmware:*:*:*:*:*:*:*:* Versions before 2.31.183 Vulnerable ·Westerndigital
- cpe:2.3:h:westerndigital:my_cloud:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Westerndigital
- cpe:2.3:o:westerndigital:my_cloud_mirror_gen2_firmware:*:*:*:*:*:*:*:* Versions before 2.31.183 Vulnerable ·Westerndigital
- cpe:2.3:h:westerndigital:my_cloud_mirror_gen2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Westerndigital
- cpe:2.3:o:westerndigital:my_cloud_ex2_ultra_firmware:*:*:*:*:*:*:*:* Versions before 2.31.183 Vulnerable ·Westerndigital
- cpe:2.3:h:westerndigital:my_cloud_ex2_ultra:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Westerndigital
- cpe:2.3:o:westerndigital:my_cloud_ex2100_firmware:*:*:*:*:*:*:*:* Versions before 2.31.183 Vulnerable ·Westerndigital
- cpe:2.3:h:westerndigital:my_cloud_ex2100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Westerndigital
- cpe:2.3:o:westerndigital:my_cloud_ex4100_firmware:*:*:*:*:*:*:*:* Versions before 2.31.183 Vulnerable ·Westerndigital
- cpe:2.3:h:westerndigital:my_cloud_ex4100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Westerndigital
Show 8 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:westerndigital:my_cloud_dl2100_firmware:*:*:*:*:*:*:*:* | before 2.31.183 | Vulnerable | Westerndigital |
| cpe:2.3:h:westerndigital:my_cloud_dl2100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Westerndigital |
| cpe:2.3:o:westerndigital:my_cloud_dl4100_firmware:*:*:*:*:*:*:*:* | before 2.31.183 | Vulnerable | Westerndigital |
| cpe:2.3:h:westerndigital:my_cloud_dl4100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Westerndigital |
| cpe:2.3:o:westerndigital:my_cloud_pr2100_firmware:*:*:*:*:*:*:*:* | before 2.31.183 | Vulnerable | Westerndigital |
| cpe:2.3:h:westerndigital:my_cloud_pr2100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Westerndigital |
| cpe:2.3:o:westerndigital:my_cloud_pr4100_firmware:*:*:*:*:*:*:*:* | before 2.31.183 | Vulnerable | Westerndigital |
| cpe:2.3:h:westerndigital:my_cloud_pr4100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Westerndigital |
- cpe:2.3:o:westerndigital:my_cloud_dl2100_firmware:*:*:*:*:*:*:*:* Versions before 2.31.183 Vulnerable ·Westerndigital
- cpe:2.3:h:westerndigital:my_cloud_dl2100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Westerndigital
- cpe:2.3:o:westerndigital:my_cloud_dl4100_firmware:*:*:*:*:*:*:*:* Versions before 2.31.183 Vulnerable ·Westerndigital
- cpe:2.3:h:westerndigital:my_cloud_dl4100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Westerndigital
- cpe:2.3:o:westerndigital:my_cloud_pr2100_firmware:*:*:*:*:*:*:*:* Versions before 2.31.183 Vulnerable ·Westerndigital
- cpe:2.3:h:westerndigital:my_cloud_pr2100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Westerndigital
- cpe:2.3:o:westerndigital:my_cloud_pr4100_firmware:*:*:*:*:*:*:*:* Versions before 2.31.183 Vulnerable ·Westerndigital
- cpe:2.3:h:westerndigital:my_cloud_pr4100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Westerndigital
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-9949
- 2026-10-03 Alias added: GHSA-qv94-w6rj-6f5p
References
More Westerndigital My Cloud Dl2100 Firmware vulnerabilities
- TI-2022-12204 Western Digital My Cloud OS 5 arbitrary file read and write vulnerability via ftp CVSS 3.1CRITICAL 9.8
- TI-2022-16678 Impersonation attack causing an Authentication Bypass on Western Digital devices CVSS 3.1CRITICAL 10.0
- TI-2022-07170 Western Digital My Cloud OS 5 and My Cloud Home Unauthenticated Arbitrary File Write Vulnerability in Netatalk CVSS 3.1CRITICAL 10.0
- TI-2019-07319 Western Digital My Cloud, My Cloud Mirror Gen2, My Cloud EX2 Ultra, My Cloud EX2100, My… CVSS 3.0CRITICAL 9.8
- TI-2022-12203 Western Digital My Cloud OS 5 devices Command Injection Vulnerability CVSS 3.1CRITICAL 9.8
- TI-2022-07174 Cross-site Scripting Vulnerability in USB Backups App CVSS 3.1HIGH 8.2
Sources
- CVE-2019-9949 · CVE Program
- CVE-2019-9949 · NVD
- FIRST EPSS
- GHSA-qv94-w6rj-6f5p · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences