{"cve":"CVE-2019-9949","nvd":{"published":"2019-05-23T14:29:08.000","modified":"2026-06-17T02:44:55.013","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-59"],"references":["https://bnbdr.github.io/posts/wd/","https://community.wd.com/t/new-release-my-cloud-firmware-versions-2-31-183-05-20-2019/237717","https://github.com/bnbdr/wd-rce/","https://bnbdr.github.io/posts/wd/","https://community.wd.com/t/new-release-my-cloud-firmware-versions-2-31-183-05-20-2019/237717"],"products":["westerndigital:my_cloud_dl2100_firmware","westerndigital:my_cloud_dl4100_firmware","westerndigital:my_cloud_ex2100_firmware","westerndigital:my_cloud_ex2_ultra_firmware","westerndigital:my_cloud_ex4100_firmware","westerndigital:my_cloud_firmware","westerndigital:my_cloud_mirror_gen2_firmware","westerndigital:my_cloud_pr2100_firmware","westerndigital:my_cloud_pr4100_firmware"],"source":"nvd","synced_at":"2026-10-19T20:56:19.218283075+00:00"},"epss":{"cve":"CVE-2019-9949","score":0.02996,"percentile":0.87345,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}