{"id":"CVE-2020-3923","aliases":["EUVD-2020-25188","GHSA-jvq4-xpx6-3rjc"],"status":"published","title":"TONNET DVR – Broken Access Control","description":"DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET, contain misconfigured authentication mechanism. Attackers can crack the default password and gain access to the system.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01679,"percentile":0.77081,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287","CWE-863"],"published":"2020-02-27T04:00:31Z","modified":"2026-06-17T03:19:16Z","products":[{"vendor":"rifatron co., ltd.","product":"dvr"},{"vendor":"tonnet","product":"dvr"},{"vendor":"tonnet","product":"tat-70432n_firmware"},{"vendor":"tonnet","product":"tat-71416g1_firmware"},{"vendor":"tonnet","product":"tat-71832g1_firmware"},{"vendor":"tonnet","product":"tat-76104g3_firmware"},{"vendor":"tonnet","product":"tat-76108g3_firmware"},{"vendor":"tonnet","product":"tat-76116g3_firmware"},{"vendor":"tonnet","product":"tat-76132g3_firmware"},{"vendor":"tonnet","product":"tat-77104g1_firmware"}],"references":[{"url":"https://tvn.twcert.org.tw/taiwanvn/TVN-201910003","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://www.chtsecurity.com/news/4ef5eb3a-fdc3-4d78-8dd7-ec7213e2bbcf","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-3923"},{"url":"https://github.com/advisories/GHSA-jvq4-xpx6-3rjc"}],"sources":{"cve":[{"id":"CVE-2020-3923","title":"TONNET DVR – Broken Access Control","description":"DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET, contain misconfigured authentication mechanism. Attackers can crack the default password and gain access to the system.","status":"published","published":"2020-02-27T04:00:31.892Z","modified":"2024-09-16T20:26:48.745Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:35:51.923913Z"}],"euvd":[{"id":"EUVD-2020-25188","description":"DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET, contain misconfigured authentication mechanism. Attackers can crack the default password and gain access to the system.","status":"published","published":"2020-02-27T04:00:31Z","modified":"2024-09-16T20:26:48Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T00:55:14.02226Z"}],"ghsa":[{"id":"GHSA-jvq4-xpx6-3rjc","title":"DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET, contain misconfigured...","description":"DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET, contain misconfigured authentication mechanism. Attackers can crack the default password and gain access to the system.","status":"published","published":"2022-05-24T17:09:50Z","modified":"2023-01-29T05:01:40Z","cwes":["CWE-863"],"updated_at":"2026-11-02T14:44:53.095202Z"}],"nvd":[{"id":"CVE-2020-3923","description":"DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET, contain misconfigured authentication mechanism. Attackers can crack the default password and gain access to the system.","status":"published","published":"2020-02-27T04:15:10.577Z","modified":"2026-06-17T03:19:16.203Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":10,"vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:05:54.796125Z"}]}}