CVE-2021-30666CISA KEVEPSS p86.2%

CVE-2021-30666Apple iOS WebKit Buffer Overflow Vulnerability

Apple / iOS

Description

Apple iOS WebKit contains a buffer-overflow vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

Scoring

EPSS3.03% probability of exploitation · percentile 86.2% · 2026-08-03T12:00:16Z

CISA KEV entry

Added to KEV: 2021-11-03

(incoming)1

TypeTargetConfidenceTier
KEVEntryApple iOS WebKit Buffer Overflow Vulnerabilitykev-cve-2021-306660%live

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Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.