CISA KEV · Known exploitedHigh

CVE-2021-30869

Apple iOS, iPadOS, and macOS

A type confusion issue was addressed with improved state handling. This issue is fixed in iOS 12.5.5, iOS 14.4 and iPadOS 14.4, macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, Security Update 2021-006 Catalina. A malicious application may be able to execute arbitrary code with kernel privileges. Apple is aware of reports that an exploit for this issue exists in the wild.

CVSS: 7.8
EPSS: 4.15%
CISA KEV: Listed
Published: 2021.08.25

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability4.15%

Technical severityCVSS 7.8

Vulnerability overview

Affected product and versions

Product: Apple iOS, iPadOS, and macOS
Affected versions: unspecified, < 14.4, >= 12.0 < 12.5.5, >= 14.0 < 14.4, >= 10.14 <= 10.14.6, >= 10.15 <= 10.15.6, 10.14.6, 10.15.7, >= 11.0 < 11.2
Fixed versions: 14.4, 12.5.5, 11.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA required action

Apply updates per vendor instructions.

Due date: 2021.11.17

1
Identify
Confirm that Apple iOS, iPadOS, and macOS and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE: CWE-843
KEV added: 2021.11.03
Ransomware use: 미확인