HOMEVULNERABILITIESCVE-2021-27942
MEDIUM

CVE-2021-27942

NVD-CWE-noinfoPublished: August 3, 2021· Updated: Jun 17, 2026

6.8
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2021-27942 requires local access, meaning attackers must already have a foothold on the target system.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 6.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorPhysical
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

vizio4 product(s)
p65-f1 firmwarep65-f1e50x-e1 firmwaree50x-e1
Source: NVD CPE · 4 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.l9group.com/advisories/vizio-tv-code-execution-from-a-usb-drive
ADVISORYhttps://www.l9group.com/advisories/vizio-tv-code-execution-from-a-usb-drive

All References (2)

→
https://www.l9group.com/advisories/vizio-tv-code-execution-from-a-usb-driveExploit · Third Party Advisory
→
https://www.l9group.com/advisories/vizio-tv-code-execution-from-a-usb-driveExploit · Third Party Advisory

Quick Facts

CVE IDCVE-2021-27942
CVSS Score6.8 / 10
SeverityMEDIUM
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected1 vendor(s)
PublishedAug 3, 2021

Related CVEs (NVD-CWE-noinfo)

CVE-2017-14378
10.0
CVE-2018-4229
10.0
CVE-2017-3324
10.0
CVE-2017-10269
10.0
CVE-2017-10137
10.0
CVE-2018-6968
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-27942 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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