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CVE Record

CVE-2021-27942: 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 fr...

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 a USB drive via the Smart Cast functionality, because files on the USB drive are effectively under the web root and can be executed.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

Specific Vizio Smart TVs can reportedly run arbitrary code from a USB drive through SmartCast because USB files are treated as executable web-root content. This is most urgent where TVs are physically accessible to visitors, staff, or contractors. The sources do not provide CVSS, patch status, or confirmed exploitation.

Executive priority

Treat this as a targeted device-hardening issue, not an internet-scale emergency based on available evidence. Prioritize public, shared, or business-critical TV deployments because physical USB access could become code execution on the device.

Technical view

CVE-2021-27942 affects Vizio P65-F1 firmware 6.0.31.4-2 and E50x-E1 firmware 10.0.31.4-2. The issue is described as arbitrary code execution from USB media via SmartCast, with USB files effectively exposed under the web root and executable. No CWE, CVSS vector, or vendor remediation is included in the provided record.

Likely exposure

Exposure appears limited to the named Vizio TV models and firmware versions, especially devices with accessible USB ports or use of untrusted removable media. The provided affected-product metadata is incomplete, so inventory confirmation is required.

Exploitation context

The public description indicates exploitation requires a USB drive and SmartCast behavior on affected TVs. The bundle does not show CISA KEV listing, exploitation in the wild, exploit code, or remote attack evidence.

Researcher notes

Evidence is sparse: the CVE record names two model and firmware combinations, describes USB-to-web-root execution behavior, and references one advisory. There is no CVSS, CWE, patch statement, or KEV evidence in the provided bundle.

Mitigation direction

  • Inventory Vizio P65-F1 and E50x-E1 TVs and record firmware versions.
  • Check Vizio or reseller guidance for firmware updates or mitigations.
  • Restrict physical access to USB ports on deployed TVs.
  • Prohibit untrusted USB media on affected Smart TVs.
  • Isolate affected TVs from sensitive internal networks where practical.

Validation and detection

  • Confirm whether deployed TVs match the named models and firmware versions.
  • Review configuration and operational use of SmartCast and USB media.
  • Check vendor support channels for current firmware and remediation notes.
  • Verify physical controls prevent unauthorized USB access.
  • Document any compensating controls for shared or public locations.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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

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description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2021-27942 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.