CVE-2020-27940Public exploit

Code execution via externally writable scripts

Published Sep 8, 2021 · Updated Aug 4, 2024

Code injection in Apple TV app for Fire OS before 6.1.0.6A142:7.1.0 allows local users to execute code through shared storage. The app extracts an embedded JavaScript application to external storage and later executes app.js without protecting it from other apps with external-storage write permission. A malicious app must receive that permission and alter app.js; its injected JavaScript then runs in the Apple TV app context and can access that app's session data.

CVSS severity4.3
Medium
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Apple TV app for Fire OS before 6.1.0.6A142:7.1.0 allows local users to execute code through shared storage. The app extracts an embedded JavaScript application to external storage and later executes app.js without protecting it from other apps with external-storage write permission. A malicious app must receive that permission and alter app.js; its injected JavaScript then runs in the Apple TV app context and can access that app's session data.

The record

CVE
CVE-2020-27940
Published
Sep 8, 2021
Updated
Aug 4, 2024
Vendor
Apple
Product
Apple TV app for Fire OS
Classifications
T1059.007
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 8, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <6.1.0.6A142:7.1.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Apple · Apple TV app for Fire OSversion=unspecified <6.1.0.6A142:7.1.0

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.0NIST NVDAV:N/AC:L/Au:S/C:N/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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