CVE-2021-30663

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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.

8.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8 /10

CVSS v2.0 : MEDIUM

V2 Legend

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

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References
Link Resource
https://support.apple.com/en-us/HT212335 Vendor Advisory Release Notes
https://support.apple.com/en-us/HT212336 Vendor Advisory Release Notes
https://support.apple.com/en-us/HT212341 Vendor Advisory Release Notes
https://support.apple.com/en-us/HT212532 Vendor Advisory Release Notes
https://support.apple.com/en-us/HT212534 Vendor Advisory Release Notes
https://support.apple.com/en-us/HT212335 Vendor Advisory Release Notes
https://support.apple.com/en-us/HT212336 Vendor Advisory Release Notes
https://support.apple.com/en-us/HT212341 Vendor Advisory Release Notes
https://support.apple.com/en-us/HT212532 Vendor Advisory Release Notes
https://support.apple.com/en-us/HT212534 Vendor Advisory Release Notes
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30663 Third Party Advisory US Government Resource
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
History

23 Oct 2025, 14:55

Type Values Removed Values Added
References () https://support.apple.com/en-us/HT212335 - Vendor Advisory () https://support.apple.com/en-us/HT212335 - Vendor Advisory, Release Notes
References () https://support.apple.com/en-us/HT212336 - Vendor Advisory () https://support.apple.com/en-us/HT212336 - Vendor Advisory, Release Notes
References () https://support.apple.com/en-us/HT212341 - Vendor Advisory () https://support.apple.com/en-us/HT212341 - Vendor Advisory, Release Notes
References () https://support.apple.com/en-us/HT212532 - Vendor Advisory () https://support.apple.com/en-us/HT212532 - Vendor Advisory, Release Notes
References () https://support.apple.com/en-us/HT212534 - Vendor Advisory () https://support.apple.com/en-us/HT212534 - Vendor Advisory, Release Notes
References () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30663 - () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30663 - Third Party Advisory, US Government Resource

22 Oct 2025, 00:17

Type Values Removed Values Added
References
  • () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30663 -

21 Oct 2025, 20:18

Type Values Removed Values Added
References
  • {'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30663', 'source': '134c704f-9b21-4f2e-91b3-4a467353bcc0'}

21 Oct 2025, 19:19

Type Values Removed Values Added
References
  • () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30663 -

14 Feb 2025, 16:22

Type Values Removed Values Added
CPE cpe:2.3:a:apple:macos:*:*:*:*:*:*:*:* cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

21 Nov 2024, 06:04

Type Values Removed Values Added
References () https://support.apple.com/en-us/HT212335 - Vendor Advisory () https://support.apple.com/en-us/HT212335 - Vendor Advisory
References () https://support.apple.com/en-us/HT212336 - Vendor Advisory () https://support.apple.com/en-us/HT212336 - Vendor Advisory
References () https://support.apple.com/en-us/HT212341 - Vendor Advisory () https://support.apple.com/en-us/HT212341 - Vendor Advisory
References () https://support.apple.com/en-us/HT212532 - Vendor Advisory () https://support.apple.com/en-us/HT212532 - Vendor Advisory
References () https://support.apple.com/en-us/HT212534 - Vendor Advisory () https://support.apple.com/en-us/HT212534 - Vendor Advisory

02 Feb 2024, 03:08

Type Values Removed Values Added
CPE cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:a:apple:macos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*

16 Sep 2021, 20:25

Type Values Removed Values Added
CPE cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
cpe:2.3:a:apple:macos:*:*:*:*:*:*:*:*
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : 6.8
v3 : 8.8
CWE CWE-190
References (MISC) https://support.apple.com/en-us/HT212341 - (MISC) https://support.apple.com/en-us/HT212341 - Vendor Advisory
References (MISC) https://support.apple.com/en-us/HT212532 - (MISC) https://support.apple.com/en-us/HT212532 - Vendor Advisory
References (MISC) https://support.apple.com/en-us/HT212335 - (MISC) https://support.apple.com/en-us/HT212335 - Vendor Advisory
References (MISC) https://support.apple.com/en-us/HT212336 - (MISC) https://support.apple.com/en-us/HT212336 - Vendor Advisory
References (MISC) https://support.apple.com/en-us/HT212534 - (MISC) https://support.apple.com/en-us/HT212534 - Vendor Advisory

08 Sep 2021, 15:30

Type Values Removed Values Added
New CVE
Information

Published : 2021-09-08 15:15

Updated : 2025-10-23 14:55

NVD link : CVE-2021-30663

Mitre link : CVE-2021-30663

CVE.ORG link : CVE-2021-30663

JSON object : View

Products Affected

apple

  • tvos
  • ipados
  • safari
  • macos
  • iphone_os
CWE
CWE-190

Integer Overflow or Wraparound