CVE-2021-1789

Known Exploited

Description

A type confusion issue was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. Processing maliciously crafted web content may lead to arbitrary code execution.

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.13%
KEV Since 
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory apple.com Vendor Advisory apple.com Vendor Advisory apple.com Vendor Advisory apple.com Vendor Advisory apple.com
Affected: Apple iOS and iPadOS
Affected: Apple macOS
Affected: Apple macOS
Affected: Apple macOS
Affected: Apple macOS
Published at:
Updated at:

References

Link Tags
https://support.apple.com/en-us/HT212147 release notes vendor advisory
https://support.apple.com/en-us/HT212146 release notes vendor advisory
https://support.apple.com/en-us/HT212148 release notes vendor advisory
https://support.apple.com/en-us/HT212149 release notes vendor advisory
https://support.apple.com/en-us/HT212152 release notes vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU/ vendor advisory mailing list
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JN6ZOD62CTO54CHTMJTHVEF6R2Y532TJ/ vendor advisory mailing list
https://security.gentoo.org/glsa/202104-03 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-1789?
CVE-2021-1789 has been scored as a high severity vulnerability.
How to fix CVE-2021-1789?
To fix CVE-2021-1789, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-1789 being actively exploited in the wild?
It is confirmed that CVE-2021-1789 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-1789?
CVE-2021-1789 affects Apple iOS and iPadOS, Apple macOS, Apple macOS, Apple macOS, Apple macOS.
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