critical
9.8
Advisory Published
CVE Published
Updated

CVE-2021-1818

First published: Tue Jan 26 2021(Updated: )

A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A remote attacker may be able to cause unexpected application termination or arbitrary code execution.

Credit: Xingwei Lin AntXingwei Lin AntXingwei Lin AntXingwei Lin Ant product-security@apple.com

Affected SoftwareAffected VersionHow to fix
Apple macOS Big Sur<11.2
11.2
Apple Catalina
Apple Mojave
Apple watchOS<7.3
7.3
Apple tvOS<14.4
14.4
Apple iOS<14.4
14.4
Apple iPadOS<14.4
14.4
Apple Ipad Os<14.4
Apple iPhone OS<14.4
Apple Mac OS X>=10.14<10.14.6
Apple Mac OS X>=10.15<10.15.7
Apple Mac OS X=10.14.6
Apple Mac OS X=10.14.6-security_update_2019-001
Apple Mac OS X=10.14.6-security_update_2019-002
Apple Mac OS X=10.14.6-security_update_2020-001
Apple Mac OS X=10.14.6-security_update_2020-002
Apple Mac OS X=10.14.6-security_update_2020-003
Apple Mac OS X=10.14.6-security_update_2020-004
Apple Mac OS X=10.14.6-security_update_2020-005
Apple Mac OS X=10.14.6-security_update_2020-006
Apple Mac OS X=10.14.6-security_update_2020-007
Apple Mac OS X=10.14.6-supplemental_update
Apple Mac OS X=10.14.6-supplemental_update_2
Apple Mac OS X=10.15.7
Apple Mac OS X=10.15.7-security_update_2020-001
Apple Mac OS X=10.15.7-supplemental_update
Apple macOS>=11.0<11.2
Apple tvOS<14.4
Apple watchOS<7.3

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is CVE-2021-1818?

    CVE-2021-1818 is a logic issue in ImageIO that has been addressed with improved state management.

  • Which software versions are affected by CVE-2021-1818?

    CVE-2021-1818 affects macOS Big Sur 11.2, Apple Catalina, Apple Mojave, Apple watchOS up to 7.3, Apple iOS up to 14.4, Apple iPadOS up to 14.4, and Apple tvOS up to 14.4.

  • How can I fix CVE-2021-1818?

    To fix CVE-2021-1818, it is recommended to update your software to the latest version available from Apple.

  • Where can I find more information about CVE-2021-1818?

    You can find more information about CVE-2021-1818 on the Apple support website at the following links: [Link 1](https://support.apple.com/en-us/HT212149), [Link 2](https://support.apple.com/en-us/HT212147), [Link 3](https://support.apple.com/en-us/HT212148)

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