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CVE-2019-9951

24
FAUCET Score

CVE-2019-9951 is an unauthenticated file upload vulnerability affecting various Western Digital My Cloud NAS devices running firmware prior to version 2.31.174. An attacker can exploit this by accessing the web/jquery/uploader/uploadify.php page without credentials, allowing them to upload arbitrary files to any location on the attached storage. This critical vulnerability, rated 9.8 CVSS, presents a low-complexity attack vector with complete compromise of confidentiality, integrity, and availability. While no active exploitation or public exploit code is currently reported, its high severity and ease of exploitation warrant immediate patching.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.31.174CPE matchmatch criteria
cpe:2.3:o:western_digital:my_cloud_mirror_gen_2_firmware:*:*:*:*:*:*:*:*
< 2.31.174CPE matchmatch criteria
cpe:2.3:o:western_digital:my_cloud_ex2_ultra_firmware:*:*:*:*:*:*:*:*
< 2.31.174CPE matchmatch criteria
cpe:2.3:o:western_digital:my_cloud_ex2100_firmware:*:*:*:*:*:*:*:*
< 2.31.174CPE matchmatch criteria
cpe:2.3:o:western_digital:my_cloud_ex4100:*:*:*:*:*:*:*:*
< 2.31.174CPE matchmatch criteria
cpe:2.3:o:western_digital:my_cloud_dl2100:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/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
3.0

Exploit Intelligence

EPSS Score
1.68%
Probability of exploitation in next 30 days
EPSS Percentile
74.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0168 is in the 62nd percentile among its peer group of 36,897 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

bnbdr.github.io / posts/wd
community.wd.com / t/new-release-my-cloud-firmware-versions-2-31-174-3-26-19/235932
Release NotesThird Party Advisory
github.com / bnbdr/wd-rce
support.wdc.com / downloads.aspx
Third Party Advisory