Security readout for executives and security teams
Plain-English summary
CVE-2021-30886 is an Apple operating-system memory safety flaw. A malicious application may be able to run code with kernel privileges, meaning it could gain very deep control of an affected device. Apple says the issue was fixed through improved memory management in the listed OS updates.
Executive priority
Prioritize patch verification for Apple fleets, especially mobile and endpoint devices. The kernel-privilege impact is serious, but the provided evidence does not show active exploitation, so urgency should focus on closing known patch gaps rather than incident escalation.
Technical view
The source describes a use-after-free vulnerability affecting Apple iOS, iPadOS, macOS, watchOS, and tvOS. The impact is arbitrary code execution with kernel privileges from an application context. Apple’s stated remediation is improved memory management in specific 2021 platform updates.
Likely exposure
Exposure is most likely on Apple devices that have not been updated to iOS 15.1, iPadOS 15.1, macOS Monterey 12.0.1, watchOS 8.1, tvOS 15.1, or later. The source bundle does not define exact vulnerable version ranges.
Exploitation context
The provided sources do not state active exploitation, and the bundle marks KEV as false. The main risk is local application-to-kernel privilege escalation, which could be valuable after malware execution or another initial compromise.
Researcher notes
Apple provides limited technical detail: use-after-free, improved memory management, and kernel-privilege code execution from an application. No CVSS, CWE, affected-version granularity, proof of exploitation, or standalone mitigation is included in the supplied sources.
Mitigation direction
- Update Apple devices to the fixed releases or later supported versions.
- Prioritize managed mobile, laptop, and shared Apple device fleets.
- Confirm vendor guidance before applying exceptions or compensating controls.
- Restrict untrusted application installation where updates cannot be completed.
- Track unsupported devices for replacement or isolation decisions.
Validation and detection
- Inventory Apple OS versions across managed devices.
- Confirm devices meet or exceed Apple’s fixed release versions.
- Check MDM compliance reports for stale or unmanaged Apple endpoints.
- Review Apple advisories for CVE-2021-30886 coverage.
- Document any devices unable to receive vendor 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-2021-30886 mapping review
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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/HT212869CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212867CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212874CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212876CVE 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.