PatchTheCVECVE-2020-21406: An issue was discovered in RK Smart TV Box MAX and V88 SmartTV box that allows attackers to cause a denial of
CVE-2020-21406 is a high-severity flaw (CVSS 7.5) affecting v88 smart tv box firmware, rk max smart tv box firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- High severity
- Public exploit reference
- Remotely exploitable, no login, no user action
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.9% (top 39%) |
| CISA exploited list | No |
| Published | 2022-07-20 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2020-21406?
v88 smart tv box firmware: mitigate or apply the listed mitigation; rk max smart tv box firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2020-21406 being exploited?
CVE-2020-21406 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2020-21406 affect?
CVE-2020-21406 affects v88 smart tv box firmware, rk max smart tv box firmware. Severity is high (CVSS 7.5). 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.
How urgent is CVE-2020-21406?
Priority 52/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action