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CVE Record

CVE-2021-30852: A type confusion issue was addressed with improved memory handling.

A type confusion issue was addressed with improved memory handling. This issue is fixed in iOS 14.8 and iPadOS 14.8, tvOS 15, watchOS 8, iOS 15 and iPadOS 15. Processing maliciously crafted web content may lead to arbitrary code execution.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

Apple says malicious web content could trigger arbitrary code execution on affected Apple devices. In practical terms, a user viewing a crafted page or content could expose the device to compromise. Apple addressed the type confusion issue with improved memory handling in listed OS releases.

Executive priority

Treat this as a high-priority Apple endpoint patching issue, especially for mobile fleets. The absence of KEV evidence lowers emergency pressure, but arbitrary code execution through web content is a serious business risk when devices remain outdated.

Technical view

CVE-2021-30852 is a type confusion memory-handling flaw reachable through processing maliciously crafted web content. The source bundle lists fixes in iOS/iPadOS 14.8, iOS/iPadOS 15, tvOS 15, and watchOS 8. No CVSS, CWE, or detailed affected version range is provided.

Likely exposure

Exposure is most relevant to unmanaged or lagging Apple mobile, tablet, TV, and watch devices below the fixed releases. The bundle does not identify specific vulnerable version ranges beyond the fixed versions, so asset validation should focus on installed OS versions.

Exploitation context

The provided sources do not state active exploitation, and the CVE is not marked as CISA KEV in the bundle. The documented attack condition is processing maliciously crafted web content, which makes user browsing or web-rendered content a plausible exposure path.

Researcher notes

The source bundle lacks CVSS, CWE, exploit details, and precise vulnerable version ranges. Do not infer more affected products than Apple lists. Research should center on Apple advisory text, installed OS versions, and whether enterprise controls can verify update compliance.

Mitigation direction

  • Update iPhones and iPads to iOS/iPadOS 14.8, 15, or later supported releases.
  • Update Apple TVs to tvOS 15 or later supported releases.
  • Update Apple Watches to watchOS 8 or later supported releases.
  • Check Apple security guidance for any device family not clearly covered in the bundle.
  • Prioritize managed devices that browse external websites or handle untrusted web content.

Validation and detection

  • Inventory Apple devices and record installed iOS, iPadOS, tvOS, and watchOS versions.
  • Confirm devices meet or exceed the fixed releases listed by Apple.
  • Identify unsupported or unmanaged devices that cannot receive the named updates.
  • Review MDM compliance status for devices exposed to external web content.
  • Document exceptions where affected version evidence is incomplete.
Prepared
Confidence
medium
Sources
8

Public sources used

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

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.

description · low confidence lookup

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.

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cve · low confidence lookup

CVE-2021-30852 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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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
AppleiOS and iPadOSunspecifiedListed
AppleiOS and iPadOSunspecifiedListed
AppletvOSunspecifiedListed
ApplewatchOSunspecifiedListed
Weakness

CWE details

No CWE listed

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