Vulnerability Monitor

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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.

Published

2021-09-08T15:15:13.413

Last Modified

2025-10-23T14:55:43.020

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

8.6

Impact Score

6.4

Weaknesses

Type: Primary
CWE-190
Type: Secondary
CWE-190

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	apple	safari	< 14.1.1	Yes
Operating System	apple	ipados	< 14.5.1	Yes
Operating System	apple	iphone_os	< 12.5.3	Yes
Operating System	apple	iphone_os	< 14.5.1	Yes
Operating System	apple	macos	< 11.3.1	Yes
Operating System	apple	tvos	< 14.6	Yes

References

https://support.apple.com/en-us/HT212335 Release Notes, Vendor Advisory ([email protected])
https://support.apple.com/en-us/HT212336 Release Notes, Vendor Advisory ([email protected])
https://support.apple.com/en-us/HT212341 Release Notes, Vendor Advisory ([email protected])
https://support.apple.com/en-us/HT212532 Release Notes, Vendor Advisory ([email protected])
https://support.apple.com/en-us/HT212534 Release Notes, Vendor Advisory ([email protected])
https://support.apple.com/en-us/HT212335 Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/en-us/HT212336 Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/en-us/HT212341 Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/en-us/HT212532 Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/en-us/HT212534 Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30663 Third Party Advisory, US Government Resource (134c704f-9b21-4f2e-91b3-4a467353bcc0)