CVE-2021-30952
Apple Multiple Products Integer Overflow or Wraparound Vulnerability - [Actively Exploited]
Description
An integer overflow was addressed with improved input validation. This issue is fixed in tvOS 15.2, macOS Monterey 12.1, Safari 15.2, iOS 15.2 and iPadOS 15.2, watchOS 8.3. Processing maliciously crafted web content may lead to arbitrary code execution.
INFO
Published Date :
Aug. 24, 2021, 7:15 p.m.
Last Modified :
March 6, 2026, 1:44 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
Apple tvOS, macOS, Safari, iPadOS and watchOS contain an integer overflow or wraparound vulnerability due to the processing of maliciously crafted web content that may lead to arbitrary code execution.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Unknown
https://support.apple.com/en-us/HT212975 ; https://support.apple.com/en-us/HT212976 ; https://support.apple.com/en-us/HT212978 ; https://support.apple.com/en-us/HT212980 ; https://support.apple.com/en-us/HT212982 ; https://nvd.nist.gov/vuln/detail/CVE-2021-30952
Affected Products
The following products are affected by CVE-2021-30952
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Upgrade affected Apple products to the latest version.
- Update vulnerable webkit packages.
- Update webkitgtk4 packages.
Public PoC/Exploit Available at Github
CVE-2021-30952 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-30952.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-30952 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-30952
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Reverse-engineering reconstruction of the Coruna iOS exploit kit (iOS 16/17 chains)
C Python
None
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-30952 vulnerability anywhere in the article.
-
CybersecurityNews
CISA Warns of macOS and iOS Vulnerabilities Exploited in Attacks
CISA Warns macOS and iOS Vulnerabilities Exploit The Cybersecurity and Infrastructure Security Agency (CISA) has issued a critical alert regarding multiple Apple vulnerabilities currently facing activ ... Read more
-
Ars Technica
Feds take notice of iOS vulnerabilities exploited under mysterious circumstances
Coruna is also notable for its use by three distinct hacking groups. Google first detected its use in February of last year in an operation conducted by a “customer of a surveillance vendor.” The vuln ... Read more
-
TheCyberThrone
CISA Adds Five Flaws to Its KEV Catalog
March 6, 2026Federal agencies face a three-week deadline to remediate a set of vulnerabilities spanning consumer devices, industrial controllers, and surveillance cameras — all confirmed to be activel ... Read more
-
Daily CyberSecurity
Coruna: The High-Powered iOS Exploit Kit Proliferating Across the Global Threat Landscape
Coruna iOS exploit kit timeline The Google Threat Intelligence Group (GTIG) has detailed the curtain on “Coruna,” a formidable iOS exploit kit that has transitioned from the hands of commercial survei ... Read more
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The Hacker News
Coruna iOS Exploit Kit Uses 23 Exploits Across Five Chains Targeting iOS 13–17.2.1
Google said it identified a "new and powerful" exploit kit dubbed Coruna (aka CryptoWaters) targeting Apple iPhone models running iOS versions between 13.0 and 17.2.1. The exploit kit featured five fu ... Read more
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CybersecurityNews
Coruna Exploit Kit With 23 Exploits Hacked Thousands of iPhones
Coruna iOS Exploit Kit Google’s Threat Intelligence Group (GTIG) has uncovered Coruna, a sophisticated iOS exploit kit containing 23 exploits across five full exploit chains that compromised thousands ... Read more
-
Google Cloud
Coruna: The Mysterious Journey of a Powerful iOS Exploit Kit
Introduction Google Threat Intelligence Group (GTIG) has identified a new and powerful exploit kit targeting Apple iPhone models running iOS version 13.0 (released in September 2019) up to version 17. ... Read more
The following table lists the changes that have been made to the
CVE-2021-30952 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Modified Analysis by [email protected]
Mar. 06, 2026
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* OR *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Changed CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* OR *cpe:2.3:a:webkitgtk:webkitgtk:*:*:*:*:*:*:*:* versions up to (excluding) 2.34.4 *cpe:2.3:a:wpewebkit:wpe_webkit:*:*:*:*:*:*:*:* versions up to (excluding) 2.34.4 Added Reference Type Apple Inc.: http://www.openwall.com/lists/oss-security/2022/01/21/2 Types: Mailing List, Third Party Advisory Added Reference Type Apple Inc.: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EQVZ3CEMTINLBZ7PBC7WRXVEVCRHNSM/ Types: Broken Link Added Reference Type Apple Inc.: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HQKWD4BXRDD2YGR5AVU7H5J5PIQIEU6V/ Types: Broken Link Added Reference Type Apple Inc.: https://support.apple.com/en-us/HT212975 Types: Release Notes, Vendor Advisory Added Reference Type Apple Inc.: https://support.apple.com/en-us/HT212976 Types: Release Notes, Vendor Advisory Added Reference Type Apple Inc.: https://support.apple.com/en-us/HT212978 Types: Release Notes, Vendor Advisory Added Reference Type Apple Inc.: https://support.apple.com/en-us/HT212980 Types: Release Notes, Vendor Advisory Added Reference Type Apple Inc.: https://support.apple.com/en-us/HT212982 Types: Release Notes, Vendor Advisory Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30952 Types: US Government Resource Added Reference Type CISA-ADP: https://cloud.google.com/blog/topics/threat-intelligence/coruna-powerful-ios-exploit-kit Types: Exploit, Third Party Advisory Added Reference Type CVE: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EQVZ3CEMTINLBZ7PBC7WRXVEVCRHNSM/ Types: Broken Link Added Reference Type CVE: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HQKWD4BXRDD2YGR5AVU7H5J5PIQIEU6V/ Types: Broken Link Added Reference Type CVE: https://support.apple.com/en-us/HT212976 Types: Release Notes, Vendor Advisory Added Reference Type CVE: https://support.apple.com/en-us/HT212975 Types: Release Notes, Vendor Advisory Added Reference Type CVE: https://www.debian.org/security/2022/dsa-5060 Types: Mailing List, Third Party Advisory Added Reference Type CVE: https://support.apple.com/en-us/HT212982 Types: Release Notes, Vendor Advisory Added Reference Type Apple Inc.: https://www.debian.org/security/2022/dsa-5060 Types: Mailing List, Third Party Advisory Added Reference Type Apple Inc.: https://www.debian.org/security/2022/dsa-5061 Types: Mailing List, Third Party Advisory Added Reference Type CVE: https://support.apple.com/en-us/HT212980 Types: Release Notes, Vendor Advisory Added Reference Type CVE: https://support.apple.com/en-us/HT212978 Types: Release Notes, Vendor Advisory Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2022/01/21/2 Types: Mailing List, Third Party Advisory Added Reference Type CVE: https://www.debian.org/security/2022/dsa-5061 Types: Mailing List, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Mar. 05, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CWE CWE-190 Added Reference https://cloud.google.com/blog/topics/threat-intelligence/coruna-powerful-ios-exploit-kit Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30952 -
CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725
Mar. 05, 2026
Action Type Old Value New Value Added Date Added 2026-03-05 Added Due Date 2026-03-26 Added Vulnerability Name Apple Multiple Products Integer Overflow or Wraparound Vulnerability Added Required Action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2022/01/21/2 Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EQVZ3CEMTINLBZ7PBC7WRXVEVCRHNSM/ Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HQKWD4BXRDD2YGR5AVU7H5J5PIQIEU6V/ Added Reference https://support.apple.com/en-us/HT212975 Added Reference https://support.apple.com/en-us/HT212976 Added Reference https://support.apple.com/en-us/HT212978 Added Reference https://support.apple.com/en-us/HT212980 Added Reference https://support.apple.com/en-us/HT212982 Added Reference https://www.debian.org/security/2022/dsa-5060 Added Reference https://www.debian.org/security/2022/dsa-5061 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Source Update by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Changed Source MITRE Apple Inc. -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference Apple Inc. https://support.apple.com/en-us/HT212975 [No types assigned] Added Reference Apple Inc. https://support.apple.com/en-us/HT212976 [No types assigned] Added Reference Apple Inc. https://support.apple.com/en-us/HT212978 [No types assigned] Added Reference Apple Inc. https://support.apple.com/en-us/HT212980 [No types assigned] Added Reference Apple Inc. https://support.apple.com/en-us/HT212982 [No types assigned] Added Reference Apple Inc. http://www.openwall.com/lists/oss-security/2022/01/21/2 [No types assigned] Added Reference Apple Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EQVZ3CEMTINLBZ7PBC7WRXVEVCRHNSM/ [No types assigned] Added Reference Apple Inc. https://www.debian.org/security/2022/dsa-5061 [No types assigned] Added Reference Apple Inc. https://www.debian.org/security/2022/dsa-5060 [No types assigned] Added Reference Apple Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HQKWD4BXRDD2YGR5AVU7H5J5PIQIEU6V/ [No types assigned] Removed Reference MITRE https://support.apple.com/en-us/HT212975 Removed Reference MITRE https://support.apple.com/en-us/HT212978 Removed Reference MITRE https://support.apple.com/en-us/HT212976 Removed Reference MITRE https://support.apple.com/en-us/HT212982 Removed Reference MITRE https://support.apple.com/en-us/HT212980 Removed Reference MITRE http://www.openwall.com/lists/oss-security/2022/01/21/2 Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/7EQVZ3CEMTINLBZ7PBC7WRXVEVCRHNSM/ Removed Reference MITRE https://www.debian.org/security/2022/dsa-5061 Removed Reference MITRE https://www.debian.org/security/2022/dsa-5060 Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/HQKWD4BXRDD2YGR5AVU7H5J5PIQIEU6V/ -
Modified Analysis by [email protected]
Feb. 25, 2022
Action Type Old Value New Value Changed Reference Type http://www.openwall.com/lists/oss-security/2022/01/21/2 No Types Assigned http://www.openwall.com/lists/oss-security/2022/01/21/2 Issue Tracking, Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/7EQVZ3CEMTINLBZ7PBC7WRXVEVCRHNSM/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/7EQVZ3CEMTINLBZ7PBC7WRXVEVCRHNSM/ Issue Tracking, Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/HQKWD4BXRDD2YGR5AVU7H5J5PIQIEU6V/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/HQKWD4BXRDD2YGR5AVU7H5J5PIQIEU6V/ Mailing List, Third Party Advisory Changed Reference Type https://www.debian.org/security/2022/dsa-5060 No Types Assigned https://www.debian.org/security/2022/dsa-5060 Issue Tracking, Third Party Advisory Changed Reference Type https://www.debian.org/security/2022/dsa-5061 No Types Assigned https://www.debian.org/security/2022/dsa-5061 Issue Tracking, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Feb. 06, 2022
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/HQKWD4BXRDD2YGR5AVU7H5J5PIQIEU6V/ [No Types Assigned] -
CVE Modified by [email protected]
Jan. 26, 2022
Action Type Old Value New Value Added Reference https://www.debian.org/security/2022/dsa-5061 [No Types Assigned] Added Reference https://www.debian.org/security/2022/dsa-5060 [No Types Assigned] -
CVE Modified by [email protected]
Jan. 23, 2022
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/7EQVZ3CEMTINLBZ7PBC7WRXVEVCRHNSM/ [No Types Assigned] -
CVE Modified by [email protected]
Jan. 21, 2022
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2022/01/21/2 [No Types Assigned] -
Initial Analysis by [email protected]
Dec. 29, 2021
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Changed Reference Type https://support.apple.com/en-us/HT212975 No Types Assigned https://support.apple.com/en-us/HT212975 Vendor Advisory Changed Reference Type https://support.apple.com/en-us/HT212976 No Types Assigned https://support.apple.com/en-us/HT212976 Vendor Advisory Changed Reference Type https://support.apple.com/en-us/HT212978 No Types Assigned https://support.apple.com/en-us/HT212978 Vendor Advisory Changed Reference Type https://support.apple.com/en-us/HT212980 No Types Assigned https://support.apple.com/en-us/HT212980 Vendor Advisory Changed Reference Type https://support.apple.com/en-us/HT212982 No Types Assigned https://support.apple.com/en-us/HT212982 Vendor Advisory Added CWE NIST CWE-190 Added CPE Configuration OR *cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* versions up to (excluding) 15.2 *cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* versions up to (excluding) 15.2 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions up to (excluding) 15.2 *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions from (including) 12.0 up to (excluding) 12.1 *cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* versions up to (excluding) 15.2 *cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* versions up to (excluding) 8.3 -
CVE Modified by [email protected]
Dec. 23, 2021
Action Type Old Value New Value Changed Description ** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate was withdrawn by the CVE program. Notes: none. An integer overflow was addressed with improved input validation. This issue is fixed in tvOS 15.2, macOS Monterey 12.1, Safari 15.2, iOS 15.2 and iPadOS 15.2, watchOS 8.3. Processing maliciously crafted web content may lead to arbitrary code execution. Added Reference https://support.apple.com/en-us/HT212975 [No Types Assigned] Added Reference https://support.apple.com/en-us/HT212978 [No Types Assigned] Added Reference https://support.apple.com/en-us/HT212976 [No Types Assigned] Added Reference https://support.apple.com/en-us/HT212982 [No Types Assigned] Added Reference https://support.apple.com/en-us/HT212980 [No Types Assigned] -
CVE Unrejected by [email protected]
Dec. 23, 2021
Action Type Old Value New Value -
CVE Rejected by [email protected]
Aug. 24, 2021
Action Type Old Value New Value