Security readout for executives and security teams
Plain-English summary
CVE-2021-27944 affects specific Vizio Smart TV models and firmware versions. The reported issue lets an unauthenticated attacker reach privileged TV APIs and potentially execute operating system commands. That makes affected TVs more than media devices; they can become footholds inside a network if exposed to untrusted access.
Executive priority
Treat this as a high-priority IoT exposure issue where affected TVs exist on business networks. It is not confirmed as actively exploited, but unauthenticated command execution on networked devices can materially increase internal compromise risk.
Technical view
The CVE describes missing access control on several high-privileged APIs in Vizio P65-F1 6.0.31.4-2 and E50x-E1 10.0.31.4-2. The reported impact is OS command execution, with file upload identified as the attack methodology. No CVSS score, CWE, patch detail, or broader product matrix is provided in the source bundle.
Likely exposure
Exposure appears limited to the named Vizio Smart TV models and firmware versions. Risk is highest where these devices are reachable from guest, user, or untrusted networks. The sources do not establish internet-scale exposure or other affected models.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. Public descriptions indicate unauthenticated access to privileged functionality leading to command execution, but do not provide verified exploitation prevalence.
Researcher notes
Evidence is sparse: affected models and firmware are named, but CVSS, CWE, patch status, and exploitation status are absent. Validate exposure through asset inventory and network reachability, then rely on vendor or advisory updates for remediation specifics.
Mitigation direction
- Check Vizio and advisory sources for firmware updates or official remediation guidance.
- Segment Smart TVs and IoT devices away from sensitive business systems.
- Block untrusted network access to TV management or API surfaces.
- Remove affected devices from high-risk networks if updates are unavailable.
- Monitor network traffic involving affected TVs for unusual administrative activity.
Validation and detection
- Inventory Vizio P65-F1 and E50x-E1 devices across offices and managed spaces.
- Confirm firmware versions against 6.0.31.4-2 and 10.0.31.4-2.
- Verify TVs are not reachable from guest or untrusted network segments.
- Review firewall rules controlling access to IoT device services.
- Check asset records for unsupported or unmanaged Vizio Smart TVs.
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.
File access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-27944 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-unauthenticated-remote-code-executionCVE 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.