HOMEVULNERABILITIESCVE-2019-9949
HIGH

CVE-2019-9949

CWE-59Published: May 23, 2019· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2019-9949 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

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 8.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

westerndigital18 product(s)
my cloud firmwaremy cloudmy cloud mirror gen2 firmwaremy cloud mirror gen2my cloud ex2 ultra firmwaremy cloud ex2 ultramy cloud ex2100 firmwaremy cloud ex2100my cloud ex4100 firmwaremy cloud ex4100my cloud dl2100 firmwaremy cloud dl2100+6
Source: NVD CPE · 18 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

ADVISORYhttps://bnbdr.github.io/posts/wd/
ADVISORYhttps://community.wd.com/t/new-release-my-cloud-firmware-versions-2-31-183-05-20-2019/237717
ADVISORYhttps://github.com/bnbdr/wd-rce/
ADVISORYhttps://bnbdr.github.io/posts/wd/
ADVISORYhttps://community.wd.com/t/new-release-my-cloud-firmware-versions-2-31-183-05-20-2019/237717
ADVISORYhttps://github.com/bnbdr/wd-rce/

All References (6)

→
https://bnbdr.github.io/posts/wd/Exploit · Third Party Advisory
→
https://community.wd.com/t/new-release-my-cloud-firmware-versions-2-31-183-05-20-2019/237717Vendor Advisory
→
https://github.com/bnbdr/wd-rce/Exploit · Third Party Advisory
→
https://bnbdr.github.io/posts/wd/Exploit · Third Party Advisory
→
https://community.wd.com/t/new-release-my-cloud-firmware-versions-2-31-183-05-20-2019/237717Vendor Advisory
→
https://github.com/bnbdr/wd-rce/Exploit · Third Party Advisory

Quick Facts

CVE IDCVE-2019-9949
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-59
CISA KEVNo
Affected1 vendor(s)
PublishedMay 23, 2019

Related CVEs (CWE-59)

CVE-2024-28185
10.0
CVE-2024-28189
10.0
CVE-2002-2374
10.0
CVE-2014-4480
10.0
CVE-2026-44881
9.9
CVE-2018-5225
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-9949 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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