CVE-2018-4263

mediumpriority · track · 36EPSS 0.020 · 81 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.99% (81st) EPSS

CVSS 6.8 · medium

Is it mine?

6 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-28

Multiple memory corruption issues were addressed with improved memory handling. This issue affected versions prior to iOS 11.4.1, tvOS 11.4.1, Safari 11.1.2, iTunes 12.8 for Windows, iCloud for Windows 7.6.

cvss

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

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–8.8

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4

v3.08.8highCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.08.1highCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-119USprimary

affected products (6)

Products and version ranges known to be affected.

n/a iOS, tvOS, Safari, iTunes for Windows, iCloud for Windows≤ Versions prior to: iOS 11.4.1, tvOS 11.4.1, 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:*:*:*:*:*:*:*:*

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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+21039 more

references (17)

External citations — patches, advisories, analysis.

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