{"id":"CVE-2019-9949","aliases":["EUVD-2019-19303","GHSA-qv94-w6rj-6f5p"],"status":"published","title":"Western Digital My Cloud Cloud, Mirror Gen2, EX2 Ultra, EX2100, EX4100, DL2100, DL4100, PR2100...","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.","severity":{"version":"3.0","score":8.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02996,"percentile":0.87434,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-59"],"published":"2019-05-23T13:22:27Z","modified":"2026-06-17T02:44:55Z","products":[{"vendor":"westerndigital","product":"my_cloud_dl2100_firmware"},{"vendor":"westerndigital","product":"my_cloud_dl4100_firmware"},{"vendor":"westerndigital","product":"my_cloud_ex2100_firmware"},{"vendor":"westerndigital","product":"my_cloud_ex2_ultra_firmware"},{"vendor":"westerndigital","product":"my_cloud_ex4100_firmware"},{"vendor":"westerndigital","product":"my_cloud_firmware"},{"vendor":"westerndigital","product":"my_cloud_mirror_gen2_firmware"},{"vendor":"westerndigital","product":"my_cloud_pr2100_firmware"},{"vendor":"westerndigital","product":"my_cloud_pr4100_firmware"}],"references":[{"url":"https://community.wd.com/t/new-release-my-cloud-firmware-versions-2-31-183-05-20-2019/237717","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://bnbdr.github.io/posts/wd/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://github.com/bnbdr/wd-rce/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-9949"},{"url":"https://bnbdr.github.io/posts/wd"},{"url":"https://github.com/bnbdr/wd-rce"},{"url":"https://github.com/advisories/GHSA-qv94-w6rj-6f5p"}],"sources":{"cve":[{"id":"CVE-2019-9949","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.","status":"published","published":"2019-05-23T13:22:27Z","modified":"2024-08-04T22:10:08.808Z","updated_at":"2026-11-02T14:20:20.081405Z"}],"euvd":[{"id":"EUVD-2019-19303","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.","status":"published","published":"2019-05-23T13:22:27Z","modified":"2024-08-04T22:10:08Z","updated_at":"2026-11-03T02:40:54.59684Z"}],"ghsa":[{"id":"GHSA-qv94-w6rj-6f5p","title":"Western Digital My Cloud Cloud, Mirror Gen2, EX2 Ultra, EX2100, EX4100, DL2100, DL4100, PR2100...","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.","status":"published","published":"2022-05-24T16:46:31Z","modified":"2024-04-04T00:46:24Z","cvss":[{"version":"3.0","score":8.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-59"],"updated_at":"2026-11-02T14:55:51.66271Z"}],"nvd":[{"id":"CVE-2019-9949","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.","status":"published","published":"2019-05-23T14:29:08Z","modified":"2026-06-17T02:44:55.013Z","cvss":[{"version":"3.0","score":8.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":9,"vector":"AV:N/AC:L/Au:S/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-59"],"updated_at":"2026-11-02T14:05:14.729983Z"}]}}