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CVE Record

CVE-2021-30903: This issue was addressed with improved checks.

This issue was addressed with improved checks. This issue is fixed in iOS 14.8.1 and iPadOS 14.8.1, iOS 15.1 and iPadOS 15.1, macOS Monterey 12.0.1. A local attacker may be able to cause unexpected application termination or arbitrary code execution.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-30903 is an Apple vulnerability where a local attacker could crash an application or run arbitrary code. Apple says the issue was fixed with improved checks in listed iOS, iPadOS, and macOS Monterey releases. The source bundle does not identify the vulnerable component, exact affected version ranges, or real-world exploitation.

Executive priority

Handle through normal Apple patch governance, with higher priority for shared, high-value, or unmanaged endpoints. The business urgency is reduced by the local attacker requirement and lack of confirmed exploitation, but arbitrary code execution keeps it above routine hygiene.

Technical view

Apple describes the flaw only as a checks issue remediated by improved validation. Impact is unexpected application termination or arbitrary code execution by a local attacker. No CWE, CVSS score, affected component, privileges required beyond local attacker context, or exploit details are provided in the bundle.

Likely exposure

Exposure is most likely on Apple iOS, iPadOS, or macOS systems that have not reached the fixed releases: iOS/iPadOS 14.8.1, iOS/iPadOS 15.1, or macOS Monterey 12.0.1. Exact vulnerable version ranges are not specified.

Exploitation context

The available evidence supports local attack context only. There is no KEV listing in the bundle and no cited source here states active exploitation. Treat this as post-access or local-user risk, not as a confirmed remotely exploitable internet-facing issue.

Researcher notes

Evidence is sparse. Apple names impact and fixed releases but omits component, root cause, CVSS, CWE, and exploit conditions. Avoid assuming remote reachability, sandbox escape, or active exploitation without additional primary evidence.

Mitigation direction

  • Update affected Apple devices to the fixed releases or later supported versions.
  • Prioritize managed devices with local user access or shared-use exposure.
  • Check Apple advisories for product-specific update applicability.
  • Use MDM reporting to identify devices below the listed fixed versions.

Validation and detection

  • Inventory iOS, iPadOS, and macOS versions across managed assets.
  • Confirm devices are at or above Apple’s listed fixed releases.
  • Review vulnerability scanner findings against Apple advisory references.
  • Document exceptions where devices cannot receive supported Apple updates.
Prepared
Confidence
medium
Sources
9

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-2021-30903 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
8Source 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
AppleiOS and iPadOSunspecifiedListed
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.