HOMEVULNERABILITIESCVE-2021-30869
HIGHCISA KEVIN THE WILD

CVE-2021-30869

Published: November 3, 2021

EPSS:2.00%probability of exploitation in 30 daysPercentile:83.4th

Official Description

Apple iOS, iPadOS, and macOS contain a type confusion vulnerability in the XNU which may allow a malicious application to execute code with kernel privileges.

NVD Source

CISA KEV Advisory

Apple iOS, iPadOS, and macOS Type Confusion Vulnerability

Apple iOS, iPadOS, and macOS contain a type confusion vulnerability in the XNU which may allow a malicious application to execute code with kernel privileges.

Added to KEV: 2021-11-03Federal patch deadline: 2021-11-17
Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

This type confusion vulnerability in Apple iOS, iPadOS, and macOS XNU may allow a malicious application to execute code with kernel privileges. Despite the absence of a CVSS score, its HIGH severity and confirmed exploitation in the wild by CISA make it a critical vulnerability. The EPSS score of 0.01997, while low, is superseded by the confirmed active exploitation.

This vulnerability is actively being exploited in the wild, as confirmed by its inclusion in CISA's KEV catalog. It requires a malicious application to be executed on the device to achieve kernel privileges.

Recommended Action

Users should apply the latest security updates for Apple iOS, iPadOS, and macOS to mitigate this vulnerability. Only install applications from trusted sources to reduce the risk of malicious application execution.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2021-30869 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2021-30869 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.

Affected Vendors & Products

Mentioned vendors (from description):
Apple
CPE data not yet available in NVD for this CVE.

Exploit & PoC Resources

ACTIVE EXPLOITATIONConfirmed exploitation in the wild
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All References (1)

Quick Facts

CVE IDCVE-2021-30869
SeverityHIGH
CISA KEVYES — Active Exploitation
ExploitIN THE WILD
EPSS (30d)2.00%
PublishedNov 3, 2021

Recommended Actions

  • Apply vendor patches immediately
  • Monitor CVE-2021-30869 in threat intel feeds
  • Review IDS/IPS signatures for exploitation attempts
  • !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
  • !Active exploitation confirmed — treat as P1
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.