{"id":"CVE-2020-29379","aliases":["EUVD-2020-21752","GHSA-w4p5-jc3g-29j3"],"status":"published","title":"An issue was discovered on V-SOL V1600D4L V1.01.49 and V1600D-MINI V1.01.48 OLT devices. During...","description":"An issue was discovered on V-SOL V1600D4L V1.01.49 and V1600D-MINI V1.01.48 OLT devices. During the process of updating the firmware, the update script starts a telnetd -l /bin/sh process that does not require authentication for TELNET access.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00324,"percentile":0.25647,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287","CWE-306"],"published":"2020-11-29T00:47:12Z","modified":"2026-06-17T03:11:14Z","products":[{"vendor":"vsolcn","product":"v1600d-mini_firmware"},{"vendor":"vsolcn","product":"v1600d4l_firmware"}],"references":[{"url":"https://seclists.org/fulldisclosure/2020/Jul/14","tags":["x_refsource_MISC","x_transferred","Exploit","Mailing List","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-29379"},{"url":"https://github.com/advisories/GHSA-w4p5-jc3g-29j3"}],"sources":{"cve":[{"id":"CVE-2020-29379","description":"An issue was discovered on V-SOL V1600D4L V1.01.49 and V1600D-MINI V1.01.48 OLT devices. During the process of updating the firmware, the update script starts a telnetd -l /bin/sh process that does not require authentication for TELNET access.","status":"published","published":"2020-11-29T00:47:12Z","modified":"2024-08-04T16:55:09.239Z","updated_at":"2026-11-02T14:35:55.460269Z"}],"euvd":[{"id":"EUVD-2020-21752","description":"An issue was discovered on V-SOL V1600D4L V1.01.49 and V1600D-MINI V1.01.48 OLT devices. During the process of updating the firmware, the update script starts a telnetd -l /bin/sh process that does not require authentication for TELNET access.","status":"published","published":"2020-11-29T00:47:12Z","modified":"2024-08-04T16:55:09Z","updated_at":"2026-11-03T03:07:07.919663Z"}],"ghsa":[{"id":"GHSA-w4p5-jc3g-29j3","title":"An issue was discovered on V-SOL V1600D4L V1.01.49 and V1600D-MINI V1.01.48 OLT devices. During...","description":"An issue was discovered on V-SOL V1600D4L V1.01.49 and V1600D-MINI V1.01.48 OLT devices. During the process of updating the firmware, the update script starts a telnetd -l /bin/sh process that does not require authentication for TELNET access.","status":"published","published":"2022-05-24T17:35:04Z","modified":"2023-01-29T05:04:34Z","cwes":["CWE-287"],"updated_at":"2026-11-02T14:45:35.654176Z"}],"nvd":[{"id":"CVE-2020-29379","description":"An issue was discovered on V-SOL V1600D4L V1.01.49 and V1600D-MINI V1.01.48 OLT devices. During the process of updating the firmware, the update script starts a telnetd -l /bin/sh process that does not require authentication for TELNET access.","status":"published","published":"2020-11-29T01:15:11.083Z","modified":"2026-06-17T03:11:14.763Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T14:06:25.394006Z"}]}}