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CVE Record

CVE-2018-4340: A memory corruption issue was addressed with improved memory handling.

A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

Apple fixed a memory corruption flaw affecting older iOS, macOS, tvOS, and watchOS releases. The provided sources do not identify the vulnerable component, attack path, CVSS score, or confirmed impact. Treat this as an older-platform hygiene issue unless unsupported Apple devices remain in service.

Executive priority

Moderate operational priority if legacy Apple devices exist; low urgency if fleet data proves all devices exceed the fixed versions. The missing severity and exploit evidence mean prioritization should be driven by asset age, exposure, and support status.

Technical view

CVE-2018-4340 is described only as a memory corruption issue addressed through improved memory handling. Affected versions are before iOS 12, macOS Mojave 10.14, tvOS 12, and watchOS 5. The bundle provides no CWE, CVSS, component, privilege requirement, or vulnerability class detail beyond memory corruption.

Likely exposure

Exposure is most likely on legacy Apple devices that have not reached iOS 12, macOS Mojave 10.14, tvOS 12, or watchOS 5. Organizations with managed Apple fleets, kiosks, lab systems, or unsupported hardware should check inventory rather than assume all devices aged out.

Exploitation context

The source bundle does not show CISA KEV listing or any cited evidence of active exploitation. It also does not describe exploit prerequisites, user interaction, network exposure, or exploit maturity. Do not treat exploitation as confirmed from this evidence alone.

Researcher notes

The public record is sparse. Key missing details include affected component, crash trigger, impact, CVSS, CWE, and exploitability conditions. Further analysis should start with Apple advisory mapping and any internal asset evidence, not assumptions about remote code execution.

Mitigation direction

  • Update Apple devices to the fixed OS versions or later where hardware supports it.
  • Retire or isolate Apple devices that cannot receive the named fixed releases.
  • Check Apple advisories for model-specific update availability and replacement guidance.
  • Prioritize managed fleet compliance for iOS, macOS, tvOS, and watchOS assets.

Validation and detection

  • Inventory Apple endpoints and record current OS versions by platform.
  • Flag devices below iOS 12, macOS Mojave 10.14, tvOS 12, or watchOS 5.
  • Confirm endpoint management reports show successful update installation.
  • Review exceptions for unsupported hardware and document compensating controls.
Prepared
Confidence
medium
Sources
7

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

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CVE-2018-4340 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
6Source 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
n/aiOS, macOS, tvOS, watchOSVersions prior to: iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5Listed
Weakness

CWE details

No CWE listed

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