{"cve":"CVE-2020-3923","nvd":{"published":"2020-02-27T04:15:10.577","modified":"2026-06-17T03:19:16.203","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-287"],"references":["https://tvn.twcert.org.tw/taiwanvn/TVN-201910003","https://www.chtsecurity.com/news/4ef5eb3a-fdc3-4d78-8dd7-ec7213e2bbcf","https://tvn.twcert.org.tw/taiwanvn/TVN-201910003","https://www.chtsecurity.com/news/4ef5eb3a-fdc3-4d78-8dd7-ec7213e2bbcf"],"products":["tonnet:tat-70432n_firmware","tonnet:tat-71416g1_firmware","tonnet:tat-71832g1_firmware","tonnet:tat-76104g3_firmware","tonnet:tat-76108g3_firmware","tonnet:tat-76116g3_firmware","tonnet:tat-76132g3_firmware","tonnet:tat-77104g1_firmware"],"source":"nvd","synced_at":"2026-10-19T21:02:53.949909883+00:00"},"epss":{"cve":"CVE-2020-3923","score":0.01679,"percentile":0.76922,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}