Security readout for executives and security teams
Plain-English summary
This Apple vulnerability could let a malicious app gain kernel-level control, the highest privilege on the device. The source bundle says Apple fixed it in iOS 14.8, iPadOS 14.8, macOS Big Sur 11.6, and Security Update 2021-005 Catalina.
Executive priority
Treat this as high priority for Apple fleets because kernel-level compromise can bypass normal user protections. The immediate business action is patch verification, especially for unmanaged endpoints and older macOS systems.
Technical view
CVE-2021-30859 is a type confusion issue addressed by improved state handling. Apple describes the impact as arbitrary code execution with kernel privileges by a malicious application. The provided record does not include CVSS, CWE, exact vulnerable build ranges, or exploit details.
Likely exposure
Exposure is most likely on Apple devices that have not installed iOS 14.8, iPadOS 14.8, macOS Big Sur 11.6, or Security Update 2021-005 Catalina. The bundle’s affected-product data is incomplete, so inventory validation should focus on Apple OS patch levels.
Exploitation context
The provided bundle does not show CISA KEV listing or any cited source confirming active exploitation. The attack context described is a malicious application executing arbitrary code with kernel privileges; no exploit method is provided in the sources.
Researcher notes
The record is sparse: no CVSS, CWE, component name, or affected build matrix is included. Keep analysis limited to Apple’s stated impact and fixed releases. Do not infer remote exploitation or public exploit availability from these sources.
Mitigation direction
- Install the Apple fixed releases named in the advisory sources.
- Prioritize devices allowing untrusted or unmanaged application installation.
- Check Apple guidance for any newer superseding security updates.
- Enforce mobile device management compliance for minimum OS versions.
Validation and detection
- Inventory iOS, iPadOS, and macOS versions across managed devices.
- Confirm macOS Big Sur devices are at 11.6 or later.
- Confirm Catalina devices have Security Update 2021-005 or later.
- Review endpoint telemetry for unexpected privileged application behavior.
- Document any unsupported Apple devices that cannot receive fixes.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-30859 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://support.apple.com/en-us/HT212804CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212805CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212807CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.