{"id":"CVE-2020-3924","aliases":["EUVD-2020-25189","GHSA-xv64-jjpm-mgjv"],"status":"published","title":"TONNET DVR – Firmware Injection","description":"DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET do not properly verify patch files. Attackers can inject a specific command into a patch file and gain access to the system.","severity":{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01258,"percentile":0.69787,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-74","CWE-77"],"published":"2020-02-27T04:00:32Z","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://www.chtsecurity.com/news/4ef5eb3a-fdc3-4d78-8dd7-ec7213e2bbcf","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://tvn.twcert.org.tw/taiwanvn/TVN-201910004","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-3924"},{"url":"https://github.com/advisories/GHSA-xv64-jjpm-mgjv"}],"sources":{"cve":[{"id":"CVE-2020-3924","title":"TONNET DVR – Firmware Injection","description":"DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET do not properly verify patch files. Attackers can inject a specific command into a patch file and gain access to the system.","status":"published","published":"2020-02-27T04:00:32.289Z","modified":"2024-09-16T17:14:12.393Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:35:51.563355Z"}],"euvd":[{"id":"EUVD-2020-25189","description":"DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET do not properly verify patch files. Attackers can inject a specific command into a patch file and gain access to the system.","status":"published","published":"2020-02-27T04:00:32Z","modified":"2024-09-16T17:14:12Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H","level":"medium"}],"updated_at":"2026-11-03T00:55:44.31512Z"}],"ghsa":[{"id":"GHSA-xv64-jjpm-mgjv","title":"DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET do not properly verify...","description":"DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET do not properly verify patch files. Attackers can inject a specific command into a patch file and gain access to the system.","status":"published","published":"2022-05-24T17:09:50Z","modified":"2023-01-29T05:01:35Z","cwes":["CWE-74"],"updated_at":"2026-11-02T14:44:51.691892Z"}],"nvd":[{"id":"CVE-2020-3924","description":"DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET do not properly verify patch files. Attackers can inject a specific command into a patch file and gain access to the system.","status":"published","published":"2020-02-27T04:15:10.67Z","modified":"2026-06-17T03:19:16.317Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H","level":"medium","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-77"],"updated_at":"2026-11-02T14:05:54.796125Z"}]}}