CVE-2021-30883

Name: CVE-2021-30883
Creator: NVD / NIST
Published: 2021-08-24T19:15:16.403+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10Actively ExploitedEPSS 14.72%

Last modified Jun 17, 2026

CVE-2021-30883 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 15.0.2 and iPadOS 15.0.2, macOS Monterey 12.0.1, iOS 14.8.1 and iPadOS 14.8.1, tvOS 15.1, watchOS 8.1, macOS Big Sur 11.6.1. CISA has confirmed active exploitation in the wild. EPSS estimates a 14.72% chance of exploitation in the next 30 days.

Description

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 15.0.2 and iPadOS 15.0.2, macOS Monterey 12.0.1, iOS 14.8.1 and iPadOS 14.8.1, tvOS 15.1, watchOS 8.1, macOS Big Sur 11.6.1. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited..

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

14.72%

96.2th 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 Jun 13, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apple	Ipados	< 14.8.1
Apple	Ipados	>= 15.0, < 15.0.2
Apple	Iphone Os	< 14.8.1
Apple	Iphone Os	>= 15.0, < 15.0.2
Apple	Macos	>= 11.0, < 11.6.1
Apple	Macos	12.0
Apple	Tvos	< 15.1
Apple	Watchos	< 8.1

References

https://support.apple.com/en-us/HT212846Vendor Advisory
https://support.apple.com/en-us/HT212868Vendor Advisory
https://support.apple.com/en-us/HT212869Vendor Advisory
https://support.apple.com/en-us/HT212872Vendor Advisory
https://support.apple.com/en-us/HT212874Vendor Advisory
https://support.apple.com/en-us/HT212876Vendor Advisory
https://support.apple.com/en-us/HT212846Vendor Advisory
https://support.apple.com/en-us/HT212868Vendor Advisory
https://support.apple.com/en-us/HT212869Vendor Advisory
https://support.apple.com/en-us/HT212872Vendor Advisory
https://support.apple.com/en-us/HT212874Vendor Advisory
https://support.apple.com/en-us/HT212876Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30883US Government Resource

Timeline

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

Frequently Asked Questions

What is CVE-2021-30883?

How severe is CVE-2021-30883?

CVE-2021-30883 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 14.72% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2021-30883?

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-2021-30883?

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

Scan your code now

Source: NVD / NIST