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
- 2021-11-03
- Patch Due Date
- 2021-11-17
- Ransomware Use
- Unknown
Technical details
- Published
- 2021-09-08
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 2021-11-17.
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?
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