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CVE Record

CVE-2021-30968: A validation issue related to hard link behavior was addressed with improved sandbox restrictions.

A validation issue related to hard link behavior was addressed with improved sandbox restrictions. This issue is fixed in macOS Big Sur 11.6.2, tvOS 15.2, macOS Monterey 12.1, Security Update 2021-008 Catalina, iOS 15.2 and iPadOS 15.2, watchOS 8.3. A malicious application may be able to bypass certain Privacy preferences.

UnknownCVSS not scoredNot KEV-listedUpdated
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This Apple issue could let a malicious app bypass some user Privacy preferences. The sources do not say which privacy controls or data types are affected. Apple fixed it across macOS, iOS/iPadOS, tvOS, and watchOS in December 2021 security updates.

Executive priority

Treat this as a hygiene and privacy-control risk for legacy Apple assets. It is not sourced as actively exploited, but unpatched devices may undermine expected privacy protections.

Technical view

CVE-2021-30968 is described as a validation issue involving hard link behavior. Apple addressed it with improved sandbox restrictions. The available sources provide no CVSS score, CWE, exploit details, or precise privacy preference scope.

Likely exposure

Exposure is mainly unpatched Apple devices below the fixed releases: iOS/iPadOS 15.2, tvOS 15.2, watchOS 8.3, macOS Monterey 12.1, Big Sur 11.6.2, or Catalina Security Update 2021-008.

Exploitation context

No KEV listing and no provided source reports active exploitation. The source says a malicious application may bypass certain Privacy preferences, implying local app execution is relevant, but exact attacker path and impact are not specified.

Researcher notes

The public record is sparse: no CVSS, CWE, affected build ranges, or technical advisory detail beyond hard link validation and sandbox restriction improvements. Avoid overstating impact without vendor or primary-source detail.

Mitigation direction

  • Update affected Apple devices to the fixed versions or later.
  • Prioritize managed fleets still running pre-December 2021 Apple OS releases.
  • Check Apple advisories for platform-specific update availability.
  • Restrict installation of untrusted apps on unmanaged or legacy devices.

Validation and detection

  • Inventory Apple OS versions across managed endpoints and mobile devices.
  • Confirm macOS Catalina systems have Security Update 2021-008 installed.
  • Check iOS/iPadOS devices are on 15.2 or later where applicable.
  • Review MDM compliance reports for unsupported or unmanaged Apple devices.
Prepared
Confidence
medium
Sources
8

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2021-30968 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
7Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
ApplewatchOSunspecifiedListed
AppleiOS and iPadOSunspecifiedListed
ApplemacOSunspecifiedListed
ApplemacOSunspecifiedListed
ApplemacOSunspecifiedListed
ApplemacOSunspecifiedListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.