CVE-2021-30869

Name: CVE-2021-30869
Creator: NVD / NIST
Published: 2021-08-24T19:15:15.08+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10Actively ExploitedEPSS 4.15%

Last modified Jun 17, 2026

CVE-2021-30869 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A type confusion issue was addressed with improved state handling. This issue is fixed in iOS 12.5.5, iOS 14.4 and iPadOS 14.4, macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, Security Update 2021-006 Catalina. CISA has confirmed active exploitation in the wild. EPSS estimates a 4.15% chance of exploitation in the next 30 days.

Description

A type confusion issue was addressed with improved state handling. This issue is fixed in iOS 12.5.5, iOS 14.4 and iPadOS 14.4, macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, Security Update 2021-006 Catalina. A malicious application may be able to execute arbitrary code with kernel privileges. Apple is aware of reports that an exploit for this issue exists in the wild.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

4.15%

89.6th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Nov 17, 2021.

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Apple	Ipados	< 14.4	—
Apple	Iphone Os	>= 12.0, < 12.5.5	—
Apple	Iphone Os	>= 14.0, < 14.4	—
Apple	Mac Os X	>= 10.14, <= 10.14.6	—
Apple	Mac Os X	>= 10.15, <= 10.15.6	—
Apple	Mac Os X	10.14.6	Security Update 2019-001
Apple	Mac Os X	10.15.7	—
Apple	Macos	>= 11.0, < 11.2	—

References

https://support.apple.com/en-us/HT212146Vendor Advisory
https://support.apple.com/en-us/HT212147Vendor Advisory
https://support.apple.com/en-us/HT212824Vendor Advisory
https://support.apple.com/en-us/HT212825Vendor Advisory
https://support.apple.com/en-us/HT212146Vendor Advisory
https://support.apple.com/en-us/HT212147Vendor Advisory
https://support.apple.com/en-us/HT212824Vendor Advisory
https://support.apple.com/en-us/HT212825Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30869US Government Resource

Timeline

Published: Aug 24, 2021
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-30869?

How severe is CVE-2021-30869?

CVE-2021-30869 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 4.15% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2021-30869?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-30869?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST