CVE-2021-30869VulnerabilityPublished 11/03/2021Updated 10/24/2026

CVE-2021-30869: Apple iOS, iPadOS, and macOS Type Confusion Vulnerability

Affects Apple iOS, iPadOS, and macOSSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 11/03/2021
KEV deadline: 11/17/2021
EPSS: 4.1% chance of exploitation in 30 days – higher than 90% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2021-30869 (opens in a new tab)

Description

CVE-2021-30869 is a type confusion vulnerability in the XNU kernel affecting Apple iOS, iPadOS, and macOS. This flaw may allow a malicious application to execute code with kernel privileges. The vulnerability has been exploited in the wild, indicating active use by attackers. No specific affected versions or patch information is provided in the input data.

Summary

Apple iOS, iPadOS, and macOS contain a type confusion vulnerability in the XNU kernel component. This vulnerability can be exploited by a malicious application to execute arbitrary code with kernel-level privileges, potentially compromising system integrity. The vulnerability is tracked as CVE-2021-30869 and is associated with CWE-843 (Type Confusion). It has been reported as exploited in the wild, highlighting its real-world impact. No explicit patch or remediation details are included in the provided data.

Impact

Successful exploitation of this vulnerability allows an attacker to execute code with kernel privileges on affected Apple devices, which can lead to full system compromise, including bypassing security mechanisms and gaining persistent control over the device. The fact that it has been exploited in the wild underscores the severity and active threat posed by this vulnerability.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users and administrators should monitor official Apple security advisories for updates and apply any available patches promptly once released.

Weaknesses

CWE-843Type Confusion (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 09:40:45 UTC

Weaknesses

References

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