CVE-2021-30663

CWE-190

Critical

92.8

RPS

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.

Source: NVD

CVSS: 8.8; High · v3.1
EPSS: 3.52%; Probability of exploitation in the next 30 days (FIRST)
CISA KEV: In CISA KEV since Nov 2021
Fix commit: No known fix commit; Sources: MoreFixes, FreshFixes
Weakness: CWE-190
Published: 8 Sept 2021; Last modified 23 Oct 2025

How to read these signals: RPS · EPSS · CISA KEV · Data sources

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  https://api.intelligence.devsecure.io/api/v1/rps/CVE-2021-30663

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Data as of 8 Oct 2026, 05:16 UK time

CVE-2021-30663

Description

Signals

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