VULNERABILITY INTELLIGENCE
CVE-2021-30663
CVSS score8.8 HIGH
EPSS probability3.52%
CISA KEVKnown exploited vulnerability
Published2021-09-08
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Known Exploited Vulnerability
Apple Multiple Products WebKit Integer Overflow Vulnerability
Vendor / product: Apple / Multiple Products
Description
An integer overflow was addressed with improved input validation. This issue is fixed in iOS 14.5.1 and iPadOS 14.5.1, tvOS 14.6, iOS 12.5.3, Safari 14.1.1, macOS Big Sur 11.3.1. Processing maliciously crafted web content may lead to arbitrary code execution.
Weakness classification
- nvd@nist.gov: CWE-190
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-190
Primary references
- product-security@apple.com — Release Notes, Vendor Advisory
- product-security@apple.com — Release Notes, Vendor Advisory
- product-security@apple.com — Release Notes, Vendor Advisory
- product-security@apple.com — Release Notes, Vendor Advisory
- product-security@apple.com — Release Notes, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Vendor Advisory
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 — Third Party Advisory, US Government Resource