PatchTheCVECVE-2021-27943: The pairing procedure used by the Vizio P65-F1 6.0.31.4-2 and E50x-E1 10.0.31.4-2 Smart TVs and mobile applica
CVE-2021-27943 is a high-severity flaw (CVSS 7.5) affecting p65-f1 firmware, e50x-e1 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The pairing procedure used by the Vizio P65-F1 6.0.31.4-2 and E50x-E1 10.0.31.4-2 Smart TVs and mobile application is vulnerable to a brute-force attack (against only 10000 possibilities), allowing a threat actor to forcefully pair the device, leading to remote control of the TV settings and configurations.
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 40%) |
| CISA exploited list | No |
| Weakness | CWE-307 |
| Published | 2021-08-02 |
| 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-2021-27943?
p65-f1 firmware: mitigate or apply the listed mitigation; e50x-e1 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2021-27943 being exploited?
CVE-2021-27943 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-2021-27943 affect?
CVE-2021-27943 affects p65-f1 firmware, e50x-e1 firmware. Severity is high (CVSS 7.5). The pairing procedure used by the Vizio P65-F1 6.0.31.4-2 and E50x-E1 10.0.31.4-2 Smart TVs and mobile application is vulnerable to a brute-force attack (against only 10000 possibilities), allowing a threat actor to forcefully pair the devi
How urgent is CVE-2021-27943?
Priority 51/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action
Related CVEs
- CVE-2021-27944 CRITICAL 9.8 MITIGATE MITIGATE Several high privileged APIs on the Vizio P65-F1 6.0.31.4-2 and E50x-E1 10.0.31.4-2 Smart TVs do not enforce a
- CVE-2021-27942 MEDIUM 6.8 MITIGATE MITIGATE Vizio P65-F1 6.0.31.4-2 and E50x-E1 10.0.31.4-2 Smart TVs allow a threat actor to execute arbitrary code from