CVE-2021-30661

8.8 HIGH CISA KEV - Actively Exploited
Published: September 08, 2021 Modified: October 23, 2025
View on NVD

Description

A use after free issue was addressed with improved memory management. This issue is fixed in Safari 14.1, iOS 12.5.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/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/HT212317
Source: product-security@apple.com
Vendor Advisory
https://support.apple.com/en-us/HT212318
Source: product-security@apple.com
Vendor Advisory
https://support.apple.com/en-us/HT212323
Source: product-security@apple.com
Vendor Advisory
https://support.apple.com/en-us/HT212324
Source: product-security@apple.com
Vendor Advisory
https://support.apple.com/en-us/HT212325
Source: product-security@apple.com
Vendor Advisory
https://support.apple.com/en-us/HT212341
Source: product-security@apple.com
Vendor Advisory
https://support.apple.com/en-us/HT212317
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://support.apple.com/en-us/HT212318
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://support.apple.com/en-us/HT212323
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://support.apple.com/en-us/HT212324
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://support.apple.com/en-us/HT212325
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://support.apple.com/en-us/HT212341
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30661
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Third Party Advisory US Government Resource

13 reference(s) from NVD

Quick Stats

CVSS v3 Score
8.8 / 10.0
EPSS (Exploit Probability)
0.2%
37th percentile
Exploitation Status
Actively Exploited
Remediation due: 2021-11-17

Weaknesses (CWE)

CWE-416 CWE-416

Affected Vendors

apple

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