CVE-2021-30663

Published: Sep 8, 2021Modified: Jun 17, 2026CISA KEV

8.8

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitability: 2.8 / Impact: 5.9

Source: NVD

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 (6)

Products: Apple: Ipados, Iphone Os, Macos, Safari, Tvos

5 products

Configuration A

6 vulnerable

Vulnerable Software	Affected Versions
Apple Ipados	14.0 ≤ version < 14.5.1
Apple Iphone Os	version < 12.5.3
Apple Iphone Os	14.0 ≤ version < 14.5.1
Apple Macos	11.0 ≤ version < 11.3.1
Apple Safari	version < 14.1.1
Apple Tvos	version < 14.6

Related CWEs

Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

References (11)

https://support.apple.com/en-us/HT212335

Source: product-security@apple.com

Release NotesVendor Advisory

https://support.apple.com/en-us/HT212336

Source: product-security@apple.com

Release NotesVendor Advisory

https://support.apple.com/en-us/HT212341

Source: product-security@apple.com

Release NotesVendor Advisory

https://support.apple.com/en-us/HT212532

Source: product-security@apple.com

Release NotesVendor Advisory

https://support.apple.com/en-us/HT212534

Source: product-security@apple.com

Release NotesVendor Advisory

https://support.apple.com/en-us/HT212335

Source: af854a3a-2127-422b-91ae-364da2661108

Release NotesVendor Advisory

https://support.apple.com/en-us/HT212336

Source: af854a3a-2127-422b-91ae-364da2661108

Release NotesVendor Advisory

https://support.apple.com/en-us/HT212341

Source: af854a3a-2127-422b-91ae-364da2661108

Release NotesVendor Advisory

https://support.apple.com/en-us/HT212532

Source: af854a3a-2127-422b-91ae-364da2661108

Release NotesVendor Advisory

https://support.apple.com/en-us/HT212534

Source: af854a3a-2127-422b-91ae-364da2661108

Release NotesVendor Advisory

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30663

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Third Party AdvisoryUS Government Resource

Timeline

No history available yet.