CVE-2021-30666

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

Description

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 12.5.3. 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/HT212341
Source: product-security@apple.com
Release Notes Vendor Advisory
https://support.apple.com/en-us/HT212341
Source: af854a3a-2127-422b-91ae-364da2661108
Release Notes Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30666
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Third Party Advisory US Government Resource

3 reference(s) from NVD

Quick Stats

CVSS v3 Score
8.8 / 10.0
EPSS (Exploit Probability)
1.5%
81th percentile
Exploitation Status
Actively Exploited
Remediation due: 2021-11-17

Weaknesses (CWE)

CWE-119 CWE-119

Affected Vendors

apple

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