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Vulnerability record · CVE-2019-18930 · published 13 November 2019

CVE-2019-18930: Western digital my cloud ex2 ultra firmware out-of-bounds write vulnerability

Western Digital · My Cloud Ex2 Ultra Firmware

Western Digital My Cloud EX2 Ultra firmware 2.31.183 allows web users (including guest account) to remotely execute arbitrary code via a stack-based buffer overflow. There is no size verification logic in one of functions in libscheddl.so, and download_mgr.cgi makes it possible to enter large-sized f_idx inputs.

8.8 CVSS 3.1 High EPSS 3.2% · top 12.3% CWE-787 · Out-of-bounds write
8.8CVSS 3.1 base score, v2 9.0
3.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Western Digital My Cloud EX2 Ultra firmware 2.31.183 allows web users (including guest account) to remotely execute arbitrary code via a stack-based buffer overflow. There is no size verification logic in one of functions in libscheddl.so, and download_mgr.cgi makes it possible to enter large-sized f_idx inputs.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/DelspoN/CVE/blob/master/CVE-2019-18930/description.txt Third Party Advisory
https://github.com/DelspoN/CVE/tree/master/CVE-2019-18930 ExploitThird Party Advisory
https://github.com/DelspoN/CVE/blob/master/CVE-2019-18930/description.txt Third Party Advisory
https://github.com/DelspoN/CVE/tree/master/CVE-2019-18930 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2019-18930), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.