CVE-2021-30663—Apple Multiple Products WebKit Integer Overflow Vulnerability

PUBLISHEDvulnerability record
2021-11-03 · last modified June 21, 2025

Metadata

CVE ID:
CVE-2021-30663
Project:
Apple
Product:
Multiple Products
Date Added:
2021-11-03
Due Date:
2021-11-17
Last Updated:
June 21, 2025

Vulnerability Name

Apple Multiple Products WebKit Integer Overflow Vulnerability

Description

Apple iOS, iPadOS, macOS, tvOS, and Safari WebKit contain an integer 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.

Known To Be Used in Ransomware Campaigns?

Ransomware Status:
Unknown

Action

Apply updates per vendor instructions.

Additional Notes

  • https://nvd.nist.gov/vuln/detail/CVE-2021-30663

Related Weaknesses

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