LiveActive security incident?Get immediate response
CVE Record

CVE-2018-4191: A memory corruption issue was addressed with improved validation.

A memory corruption issue was addressed with improved validation. This issue affected versions prior to iOS 12, tvOS 12, watchOS 5, Safari 12, iTunes 12.9 for Windows, iCloud for Windows 7.7.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2018-4191 is an Apple memory corruption issue fixed by improved validation. It affected older releases before iOS 12, tvOS 12, watchOS 5, Safari 12, iTunes 12.9 for Windows, and iCloud for Windows 7.7. The source bundle provides no CVSS, CWE, detailed impact, or exploitation evidence.

Executive priority

Medium operational priority if legacy Apple or Windows Apple software remains in the environment; otherwise low immediate urgency. The main business risk is unmanaged obsolete software, not confirmed active exploitation from the provided sources.

Technical view

The CVE record describes a memory corruption flaw addressed through improved validation across several Apple products. The available sources identify affected pre-fix versions but do not specify the vulnerable component, attack vector, privileges required, user interaction, or final security impact.

Likely exposure

Exposure is most likely on legacy Apple devices, Safari installations, and Windows systems still running iTunes before 12.9 or iCloud for Windows before 7.7. Current managed fleets should verify version compliance rather than assume absence.

Exploitation context

The bundle marks KEV as false and provides no cited evidence of active exploitation. Treat exploitation status as unconfirmed, not absent. The public details are too limited to infer exploit maturity or real-world use.

Researcher notes

Evidence is sparse. The sources support only a memory corruption classification, fixed-version boundaries, and improved validation as the remedy. Do not infer code execution, web content exposure, sandbox escape, or exploit availability without additional vendor detail.

Mitigation direction

  • Upgrade iOS, tvOS, watchOS, Safari, iTunes for Windows, and iCloud for Windows to fixed versions or later.
  • Prioritize legacy and unmanaged endpoints that may have missed 2018 Apple security updates.
  • Check Apple security guidance for any product-specific update instructions.
  • Remove unsupported Apple software where updates are no longer available.

Validation and detection

  • Inventory endpoints for the affected Apple products and versions.
  • Confirm iOS 12, tvOS 12, watchOS 5, Safari 12, iTunes 12.9, or iCloud 7.7 minimum versions.
  • Review patch management records for Apple security updates around the listed releases.
  • Flag obsolete devices or software that cannot reach the fixed versions.
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.

cve · low confidence lookup

CVE-2018-4191 mapping review

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

Open ATT&CK lookup
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
n/aiOS, tvOS, watchOS, Safari, iTunes for Windows, iCloud for WindowsVersions prior to: iOS 12, tvOS 12, watchOS 5, Safari 12, iTunes 12.9 for Windows, iCloud for Windows 7.7Listed
Weakness

CWE details

No CWE listed

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