CVE-2021-1871

Known Exploited

Description

A logic issue was addressed with improved restrictions. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, iOS 14.4 and iPadOS 14.4. A remote attacker may be able to cause arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..

9.8

CVSS

Severity: Critical

CVSS 3.1 •

CVSS 2.0 •

EPSS 1.00% Top 25%

KEV Since

Vendor Advisory fedoraproject.org Vendor Advisory debian.org Vendor Advisory apple.com Vendor Advisory apple.com

Affected: Apple iOS and iPadOS

Affected: Apple macOS

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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU/	mailing list vendor advisory
https://www.debian.org/security/2021/dsa-4923	mailing list third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-1871?: CVE-2021-1871 has been scored as a critical severity vulnerability.
How to fix CVE-2021-1871?: To fix CVE-2021-1871, 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-2021-1871 being actively exploited in the wild?: It is confirmed that CVE-2021-1871 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-1871?: CVE-2021-1871 affects Apple iOS and iPadOS, Apple macOS.

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