PatchTheCVECVE-2020-27402: The HK1 Box S905X3 TV Box contains a vulnerability that allows a local unprivileged user to escalate to root u
CVE-2020-27402 is a high-severity flaw (CVSS 7.8) affecting hk1 box s905x3 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The HK1 Box S905X3 TV Box contains a vulnerability that allows a local unprivileged user to escalate to root using the /system/xbin/su binary via a serial port (UART) connection or using adb.
Why this priority
- High severity
- Public exploit reference
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 7.8 (High) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.5% (top 55%) |
| CISA exploited list | No |
| Published | 2020-11-05 |
| 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-2020-27402?
hk1 box s905x3 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2020-27402 being exploited?
CVE-2020-27402 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-2020-27402 affect?
CVE-2020-27402 affects hk1 box s905x3 firmware. Severity is high (CVSS 7.8). The HK1 Box S905X3 TV Box contains a vulnerability that allows a local unprivileged user to escalate to root using the /system/xbin/su binary via a serial port (UART) connection or using adb.
How urgent is CVE-2020-27402?
Priority 44/100. High severity; Public exploit reference