HIGH CISA KEV

CVE-2021-30663

CVSS v3

8.8

HIGH

EPSS Score

1.1%

exploit probability

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

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.

CISA Known Exploited Vulnerability

Date Added
11/3/2021
Patch Due Date
11/17/2021
Ransomware Use
Unknown

Technical details

Published
9/8/2021

Frequently asked questions

What is CVE-2021-30663?

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.

Is CVE-2021-30663 actively exploited?

Yes. CVE-2021-30663 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 11/17/2021.

What is the CVSS score for CVE-2021-30663?

CVE-2021-30663 has a CVSS v3 base score of 8.8 (HIGH severity).

Is CVE-2021-30663 affecting your environment?

Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.

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