CVE-2020-3883

Arbitrary entitlement use via insufficient checks

Published Apr 1, 2020 · Updated Aug 4, 2024

Improper entitlement validation in AppleMobileFileIntegrity on iOS, macOS, tvOS, and watchOS allows local users to use arbitrary entitlements. Apple identifies only improved checks and has not published the exact entitlement-validation operation that accepts unauthorized application claims. Execution of an application on an affected device is required, and arbitrary entitlements can grant access to protected capabilities and resources.

CVSS severity8.8
High
EPSS probability1.04%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper entitlement validation in AppleMobileFileIntegrity on iOS, macOS, tvOS, and watchOS allows local users to use arbitrary entitlements. Apple identifies only improved checks and has not published the exact entitlement-validation operation that accepts unauthorized application claims. Execution of an application on an affected device is required, and arbitrary entitlements can grant access to protected capabilities and resources.

The record

CVE
CVE-2020-3883
Published
Apr 1, 2020
Updated
Aug 4, 2024
Vendor
Apple
Product
iOS
Classifications
T1548
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Apr 1, 2020CVE 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 <iOS 13.4 and iPadOS 13.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Apple · iOSversion=unspecified <iOS 13.4 and iPadOS 13.4
Apple · tvOSversion=unspecified <tvOS 13.4
Apple · macOSversion=unspecified <macOS Catalina 10.15.4
Apple · watchOSversion=unspecified <watchOS 6.2

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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 exploitUnconfirmed

Weakness, pattern, technique

T1548Abuse Elevation Control Mechanism

Public exploit references

No public exploit references are available in this record.

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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