Security readout for executives and security teams
Plain-English summary
Some Vizio Smart TVs used a weak mobile pairing process with only 10,000 possible pairing values. An attacker who can reach the TV’s pairing interface may be able to pair without authorization and remotely change TV settings or configuration. The sources do not show active exploitation or a confirmed patch.
Executive priority
Treat this as a targeted IoT exposure issue, not an enterprise-wide emergency. Prioritize shared or public-network TVs because unauthorized control of displays and configurations can disrupt operations or create embarrassment, but current sources do not support active exploitation or critical severity.
Technical view
CVE-2021-27943 affects the pairing procedure for Vizio P65-F1 6.0.31.4-2 and E50x-E1 10.0.31.4-2 Smart TVs with the mobile application. The issue is brute-forceable pairing space, enabling forced pairing and remote control of TV settings/configuration. No CVSS, CWE, or KEV evidence is provided.
Likely exposure
Exposure is most likely where the named Vizio TV models and firmware versions are present on networks reachable by untrusted users, such as offices, shared facilities, hospitality, or conference spaces. The provided affected-product metadata is incomplete, so do not assume broader Vizio exposure without vendor confirmation.
Exploitation context
The source bundle supports brute-force pairing risk, but not active exploitation. KEV status is false, and no cited source in the bundle confirms exploitation in the wild. Practical risk depends on attacker network proximity or reachability to the TV pairing service.
Researcher notes
The CVE record names specific models and versions in the description, while structured affected fields are n/a. CVSS and CWE are absent. Scope, fixed versions, and exploit prevalence should be confirmed against the L9 advisory and Vizio guidance before broad remediation claims.
Mitigation direction
- Check Vizio and advisory guidance for firmware updates or vendor mitigations.
- Update affected TVs if Vizio provides a fixed firmware path.
- Isolate smart TVs on restricted IoT or guest networks.
- Limit TV management access to trusted devices and administrators.
- Avoid placing affected TVs on networks shared with untrusted users.
Validation and detection
- Inventory Vizio P65-F1 and E50x-E1 TVs and record firmware versions.
- Confirm whether firmware matches 6.0.31.4-2 or 10.0.31.4-2.
- Review TV network placement and who can reach pairing interfaces.
- Check vendor guidance for patched or unaffected firmware versions.
- Document compensating controls if no vendor fix is available.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-27943 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.vizio.com/CVE reference · x_refsource_MISC
- https://www.l9group.com/advisories/vizio-tv-mobile-pairing-is-vulnerable-to-brute-force-attacksCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.