{"cve":"CVE-2020-21406","nvd":{"published":"2022-07-20T19:15:08.103","modified":"2026-06-17T03:03:40.110","status":"Modified","description":"An issue was discovered in RK Smart TV Box MAX and V88 SmartTV box that allows attackers to cause a denial of service via the switchNextDisplayInterface service.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":[],"references":["https://github.com/helloworldxp/TVBoxBugs/blob/master/RK_MAX_V88_SmartTV_Vulnerability","https://github.com/helloworldxp/TVBoxBugs/blob/master/RK_MAX_V88_SmartTV_Vulnerability"],"products":["rk_max_smart_tv_box_project:rk_max_smart_tv_box_firmware","v88_smart_tv_box_project:v88_smart_tv_box_firmware"],"source":"nvd","synced_at":"2026-10-19T21:33:44.859608815+00:00"},"epss":{"cve":"CVE-2020-21406","score":0.00946,"percentile":0.61138,"date":"2026-11-01"},"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."]}