CVE-2021-30952

7.8 HIGH CISA KEV - Actively Exploited
Published: August 24, 2021 Modified: March 06, 2026
View on NVD

Description

An integer overflow was addressed with improved input validation. This issue is fixed in tvOS 15.2, macOS Monterey 12.1, Safari 15.2, iOS 15.2 and iPadOS 15.2, watchOS 8.3. Processing maliciously crafted web content may lead to arbitrary code execution.

AI Explanation

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

Login to generate AI explanation

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
http://www.openwall.com/lists/oss-security/2022/01/21/2
Source: product-security@apple.com
Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EQVZ3CEMTINLBZ7PBC7WRXVEVCRHNSM/
Source: product-security@apple.com
Broken Link
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HQKWD4BXRDD2YGR5AVU7H5J5PIQIEU6V/
Source: product-security@apple.com
Broken Link
https://support.apple.com/en-us/HT212975
Source: product-security@apple.com
Release Notes Vendor Advisory
https://support.apple.com/en-us/HT212976
Source: product-security@apple.com
Release Notes Vendor Advisory
https://support.apple.com/en-us/HT212978
Source: product-security@apple.com
Release Notes Vendor Advisory
https://support.apple.com/en-us/HT212980
Source: product-security@apple.com
Release Notes Vendor Advisory
https://support.apple.com/en-us/HT212982
Source: product-security@apple.com
Release Notes Vendor Advisory
https://www.debian.org/security/2022/dsa-5060
Source: product-security@apple.com
Mailing List Third Party Advisory
https://www.debian.org/security/2022/dsa-5061
Source: product-security@apple.com
Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/01/21/2
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EQVZ3CEMTINLBZ7PBC7WRXVEVCRHNSM/
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HQKWD4BXRDD2YGR5AVU7H5J5PIQIEU6V/
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
https://support.apple.com/en-us/HT212975
Source: af854a3a-2127-422b-91ae-364da2661108
Release Notes Vendor Advisory
https://support.apple.com/en-us/HT212976
Source: af854a3a-2127-422b-91ae-364da2661108
Release Notes Vendor Advisory
https://support.apple.com/en-us/HT212978
Source: af854a3a-2127-422b-91ae-364da2661108
Release Notes Vendor Advisory
https://support.apple.com/en-us/HT212980
Source: af854a3a-2127-422b-91ae-364da2661108
Release Notes Vendor Advisory
https://support.apple.com/en-us/HT212982
Source: af854a3a-2127-422b-91ae-364da2661108
Release Notes Vendor Advisory
https://www.debian.org/security/2022/dsa-5060
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://www.debian.org/security/2022/dsa-5061
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://cloud.google.com/blog/topics/threat-intelligence/coruna-powerful-ios-exploit-kit
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30952
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource

22 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.8 / 10.0
EPSS (Exploit Probability)
1.6%
81th percentile
Exploitation Status
Actively Exploited
Remediation due: 2026-03-26

Weaknesses (CWE)

CWE-190 CWE-190

Affected Vendors

debian webkitgtk wpewebkit fedoraproject apple

Related CVEs

CVE-2026-4472 6.3
CVE-2026-4471 4.7
CVE-2026-4470 4.7
CVE-2026-4469 4.7
CVE-2026-33035 N/A