Is CVE-2021-30952 actively exploited?

CVE-2021-30952 has no public evidence of in-the-wild exploitation as of 2026-03-06.

What is the CVSS score for CVE-2021-30952?

CVE-2021-30952 has a CVSS score of 7.8 (HIGH severity). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

How do I patch CVE-2021-30952?

Patch guidance is available from apple security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-30952.

Fix CVE-2021-30952 - HIGH apple safari

Q: Which products are affected by CVE-2021-30952?

12 products: apple safari, apple ipados, apple iphone os, apple macos, apple tvos, and 7 more.

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.

CVSS Metrics

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector: local
Complexity: low
Privileges: none
User Action: required
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-190 · Integer Overflow CWE-190 · Integer Overflow

Metadata

Primary Vendor: APPLE
Published: 8/24/2021
Last Modified: 3/6/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

apple : safariapple : ipadosapple : iphone_osapple : macosapple : tvosapple : watchosfedoraproject : fedorafedoraproject : fedoradebian : debian_linuxdebian : debian_linuxwebkitgtk : webkitgtkwpewebkit : wpe_webkit

Remediation Guidance

Executive Summary

View on NIST NVD