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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-27943
• https://cvecps.mitre.org/cps/workitems/336365/update/
• https://www.l9group.com/advisories/vizio-tv-mobile-pairing-is-vulnerable-to-brute-force-attacks
• https://www.l9group.com/advisories/vizio-tv-unauthenticated-remote-code-execution
• https://www.vizio.com