CVE-2018-4140: n/a vulnerability

CVE-2018-4140: An issue was discovered in certain Apple products.

An issue was discovered in certain Apple products. iOS before 11.3 is affected. The issue involves the "Telephony" component. It allows remote attackers to cause a denial of service (NULL pointer dereference and reboot) via a Class 0 SMS message.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 5, 2024, 05:04 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2018-4140 is an Apple iOS Telephony flaw where a specially formed Class 0 SMS could make an affected device reboot. The business impact is availability disruption, not data theft or system takeover based on the provided sources. Exposure is limited to Apple devices still running iOS versions before 11.3 that can receive SMS. Modern, patched fleets should have little practical exposure, but unmanaged or legacy devices may remain at risk. Treat as a legacy-device hygiene issue. Prioritize remediation where SMS-capable iOS devices remain below 11.3, especially executive, field, or operational phones that depend on availability. Mitigation focus: Update affected iOS devices to iOS 11.3 or later.; Check Apple advisory HT208693 for vendor-confirmed guidance.; Remove or isolate devices that cannot be updated..

Prepared: Jun 7, 2026, 14:03 UTC (UTC+00:00)

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

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Apr 3, 2018, 06:00 UTC (UTC+00:00)

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

2Source links

CVSS and timeline data

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

Source materials

CVE List V5 sourceCVE List V5
https://support.apple.com/HT208693CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

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Weakness

CWE details

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