7.8
High
Exploited
CVE-2021-30663 Apple Multiple Products WebKit Integer Overflow Vulnerability
Active exploitation observed
· CISA KEV catalogue
Required action
Apply updates per vendor instructions.
Ransomware campaigns
Not observed so far
Weakness
CWE-20, CWE-190
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| macOS 14.1 | earliest → < 14.1 | 14.1 |
References
- support.apple.com support.apple.com
- support.apple.com support.apple.com
- support.apple.com support.apple.com
- support.apple.com support.apple.com
- support.apple.com support.apple.com
Timeline
- Published
- Added to the KEV catalogue
- Last modified
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