CVE-2018-17153

Exp

It was discovered that the Western Digital My Cloud device before 2.30.196 is affected by an authentication bypass vulnerability. An unauthenticated attacker can exploit this vulnerability to authenticate as an admin user without needing to provide a password, thereby gaining full control of the device. (Whenever an admin logs into My Cloud, a server-side session is created that is bound to the user's IP address. After the session is created, it is possible to call authenticated CGI modules by sending the cookie username=admin in the HTTP request. The invoked CGI will check if a valid session is present and bound to the user's IP address.) It was found that it is possible for an unauthenticated attacker to create a valid session without a login. The network_mgr.cgi CGI module contains a command called "cgi_get_ipv6" that starts an admin session -- tied to the IP address of the user making the request -- if the additional parameter "flag" with the value "1" is provided. Subsequent invocation of commands that would normally require admin privileges now succeed if an attacker sets the username=admin cookie.

Published: 2018-09-18 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-17153 is rated High Exploit Risk (88.6/100): CVSS Critical severity, with high exploitation likelihood (EPSS 91.95%, 100th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2018-17153

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-17153

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-29 92.43% 91.95% -0.48%
2 2026-04-04 92.51% 92.43% -0.08%
3 2026-03-13 — 92.51% —

Full EPSS history (32 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-17153

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2018-17153

Affected software / configurations for CVE-2018-17153

Vendor Product Version Raw CPE
western_digital my_cloud_wdbctl0020hwt_firmware < 2.30.196 cpe:2.3:o:western_digital:my_cloud_wdbctl0020hwt_firmware:*:*:*:*:*:*:*:*
western_digital my_cloud_pr4100 < 2.30.196 cpe:2.3:o:western_digital:my_cloud_pr4100:*:*:*:*:*:*:*:*
western_digital my_cloud_pr2100_firmware < 2.30.196 cpe:2.3:o:western_digital:my_cloud_pr2100_firmware:*:*:*:*:*:*:*:*
western_digital my_cloud_mirror_gen_2_firmware < 2.30.196 cpe:2.3:o:western_digital:my_cloud_mirror_gen_2_firmware:*:*:*:*:*:*:*:*
western_digital my_cloud_mirror_firmware < 2.30.196 cpe:2.3:o:western_digital:my_cloud_mirror_firmware:*:*:*:*:*:*:*:*
western_digital my_cloud_ex4100 < 2.30.196 cpe:2.3:o:western_digital:my_cloud_ex4100:*:*:*:*:*:*:*:*
western_digital my_cloud_ex4_firmware < 2.30.196 cpe:2.3:o:western_digital:my_cloud_ex4_firmware:*:*:*:*:*:*:*:*
western_digital my_cloud_ex2100_firmware < 2.30.196 cpe:2.3:o:western_digital:my_cloud_ex2100_firmware:*:*:*:*:*:*:*:*
western_digital my_cloud_ex2_ultra_firmware < 2.30.196 cpe:2.3:o:western_digital:my_cloud_ex2_ultra_firmware:*:*:*:*:*:*:*:*
western_digital my_cloud_ex2_firmware < 2.30.196 cpe:2.3:o:western_digital:my_cloud_ex2_firmware:*:*:*:*:*:*:*:*
western_digital my_cloud_dl4100_firmware < 2.30.196 cpe:2.3:o:western_digital:my_cloud_dl4100_firmware:*:*:*:*:*:*:*:*
western_digital my_cloud_dl2100 < 2.30.196 cpe:2.3:o:western_digital:my_cloud_dl2100:*:*:*:*:*:*:*:*

References for CVE-2018-17153

cvelogic Threat Intelligence