CVE-2021-30900

7.8 HIGH CISA KEV - Actively Exploited

Published: August 24, 2021 Modified: October 23, 2025

Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 14.8.1 and iPadOS 14.8.1, iOS 15.1 and iPadOS 15.1. A malicious application may be able to execute arbitrary code with kernel privileges.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

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

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://support.apple.com/en-us/HT212867

Source: product-security@apple.com

Vendor Advisory

https://support.apple.com/en-us/HT212868

Source: product-security@apple.com

Vendor Advisory

https://support.apple.com/kb/HT212872

Source: product-security@apple.com

Vendor Advisory

https://support.apple.com/en-us/HT212867

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://support.apple.com/en-us/HT212868

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://support.apple.com/kb/HT212872

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30900

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

US Government Resource

7 reference(s) from NVD

Quick Stats

CVSS v3 Score

7.8 / 10.0

EPSS (Exploit Probability)

1.2%

78th percentile

Exploitation Status

Actively Exploited

Remediation due: 2023-04-20

Weaknesses (CWE)

CWE-787 CWE-787

Affected Vendors

apple

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