{"id":"CVE-2018-16221","aliases":["EUVD-2018-8073","GHSA-qpg6-9qg9-qpwr"],"status":"published","title":"The diagnostics web interface in the Yeahlink Ultra-elegant IP Phone SIP-T41P (firmware 66.83.0...","description":"The diagnostics web interface in the Yeahlink Ultra-elegant IP Phone SIP-T41P (firmware 66.83.0.35) does not validate (escape) the path information (path traversal), which allows an authenticated remote attacker to get access to privileged information (e.g., /etc/passwd) via path traversal (relative path information in the file parameter of the corresponding POST request).","severity":{"version":"3.0","score":8,"vector":"CVSS:3.0/AV:A/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":0.01471,"percentile":0.73947,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-22"],"published":"2019-05-29T17:59:34Z","modified":"2026-06-17T01:43:54Z","products":[{"vendor":"yealink","product":"ultra-elegant_ip_phone_sip-t41p_firmware"}],"references":[{"url":"https://www.sit.fraunhofer.de/de/securitytestlab/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://www.sit.fraunhofer.de/fileadmin/dokumente/CVE/Advisory_Yealink_Ultra-elegantIPPhone_SIPT41P.pdf?_=1549375271","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-16221"},{"url":"https://www.sit.fraunhofer.de/de/securitytestlab"},{"url":"https://github.com/advisories/GHSA-qpg6-9qg9-qpwr"}],"sources":{"cve":[{"id":"CVE-2018-16221","description":"The diagnostics web interface in the Yeahlink Ultra-elegant IP Phone SIP-T41P (firmware 66.83.0.35) does not validate (escape) the path information (path traversal), which allows an authenticated remote attacker to get access to privileged information (e.g., /etc/passwd) via path traversal (relative path information in the file parameter of the corresponding POST request).","status":"published","published":"2019-05-29T17:59:34Z","modified":"2024-08-05T10:17:38.407Z","updated_at":"2026-11-02T14:35:11.072321Z"}],"euvd":[{"id":"EUVD-2018-8073","description":"The diagnostics web interface in the Yeahlink Ultra-elegant IP Phone SIP-T41P (firmware 66.83.0.35) does not validate (escape) the path information (path traversal), which allows an authenticated remote attacker to get access to privileged information (e.g., /etc/passwd) via path traversal (relative path information in the file parameter of the corresponding POST request).","status":"published","published":"2019-05-29T17:59:34Z","modified":"2024-08-05T10:17:38Z","updated_at":"2026-11-03T02:39:42.279742Z"}],"ghsa":[{"id":"GHSA-qpg6-9qg9-qpwr","title":"The diagnostics web interface in the Yeahlink Ultra-elegant IP Phone SIP-T41P (firmware 66.83.0...","description":"The diagnostics web interface in the Yeahlink Ultra-elegant IP Phone SIP-T41P (firmware 66.83.0.35) does not validate (escape) the path information (path traversal), which allows an authenticated remote attacker to get access to privileged information (e.g., /etc/passwd) via path traversal (relative path information in the file parameter of the corresponding POST request).","status":"published","published":"2022-05-24T16:46:48Z","modified":"2024-04-04T00:49:15Z","cvss":[{"version":"3.0","score":8,"vector":"CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:55:52.162148Z"}],"nvd":[{"id":"CVE-2018-16221","description":"The diagnostics web interface in the Yeahlink Ultra-elegant IP Phone SIP-T41P (firmware 66.83.0.35) does not validate (escape) the path information (path traversal), which allows an authenticated remote attacker to get access to privileged information (e.g., /etc/passwd) via path traversal (relative path information in the file parameter of the corresponding POST request).","status":"published","published":"2019-05-29T18:29:00.85Z","modified":"2026-06-17T01:43:54.517Z","cvss":[{"version":"3.0","score":8,"vector":"CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.7,"vector":"AV:A/AC:L/Au:S/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:04:57.307075Z"}]}}