CVE-2021-30952

CVE Enrichment

CVSS: 7.8 HIGH
EPSS: 6.96%
EPSS Percentile: 93.98%
CISA KEV: YES — Known Exploited Vulnerability

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: product-security@apple.com
Published: 25-Aug-2021 02:15
Last Modified: 17-Jun-2026 10:51
EPSS Date: 2026-10-10
CWE: CWE-190

CVSS Vector


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

CISA KEV Details

Date Added: 2026-03-05
Remediation Due: 2026-03-26
Known Ransomware Campaign Use: Unknown
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.
Notes: 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 / Versions

apple / safari
Version / affected range: * · before (exclusive) 15.2
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
apple / ipados
Version / affected range: * · before (exclusive) 15.2
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple / iphone_os
Version / affected range: * · before (exclusive) 15.2
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple / macos
Version / affected range: * · from (inclusive) 12.0 · before (exclusive) 12.1
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple / tvos
Version / affected range: * · before (exclusive) 15.2
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
apple / watchos
Version / affected range: * · before (exclusive) 8.3
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
fedoraproject / fedora
Version / affected range: 34
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
fedoraproject / fedora
Version / affected range: 35
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
debian / debian_linux
Version / affected range: 10.0
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
debian / debian_linux
Version / affected range: 11.0
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
webkitgtk / webkitgtk
Version / affected range: * · before (exclusive) 2.34.4
cpe:2.3:a:webkitgtk:webkitgtk:*:*:*:*:*:*:*:*
wpewebkit / wpe_webkit
Version / affected range: * · before (exclusive) 2.34.4
cpe:2.3:a:wpewebkit:wpe_webkit:*:*:*:*:*:*:*:*

References

Last enrichment sync: 11-Oct-2026 15:57
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

iOS 11.0–15.1 (mmrZ0r) — Coruna buffout (CVE-2021-30952, fixed 15.2) and jacurutu (CVE-2022-48503, fixed 15.6) Compromised npm Package Delivered Coruna-Like iOS Exploit Framework

CVE (3)

Malware (4)

People (1)

Threat Actors (1)

MITRE ATT&CK (9)

Products (4)

Tools (11)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.