CVE-2018-4266

mediumpriority · track · 25EPSS 0.018 · 78 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.78% (78th) EPSS

CVSS 4.3 · medium

Is it mine?

7 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-28

A race condition was addressed with additional validation. This issue affected versions prior toiVersions prior to: OS 11.4.1, tvOS 11.4.1, watchOS 4.3.2, Safari 11.1.2, iTunes 12.8 for Windows, iCloud for Windows 7.6.

cvss

Technical severity, 0–10. One row per scoring source.

5.9

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.05.9mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.2 · impact 3.6

v3.05.4mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-362USprimary

affected products (7)

Products and version ranges known to be affected.

n/a iOS, tvOS, watchOS, Safari, iTunes for Windows, iCloud for Windows≤ Versions prior to: OS 11.4.1, tvOS 11.4.1, watchOS 4.3.2, Safari 11.1.2, iTunes 12.8 for Windows, iCloud for Windows 7.6enisa_euvdEU
apple icloud< 7.6nvdUScpe:2.3:a:apple:icloud:*:*:*:*:*:*:*:*
apple iphone os< 11.4.1nvdUScpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple itunes< 12.8nvdUScpe:2.3:a:apple:itunes:*:*:*:*:*:*:*:*
apple safari< 11.1.2nvdUScpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
apple tvos< 11.4.1nvdUScpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
apple watchos< 4.3.2nvdUScpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2019-04-03modified 2026-06-17

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Related entries.

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+4150 more

references (19)

External citations — patches, advisories, analysis.

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