CVE-2018-4438

mediumpriority · attend · 47EPSS 0.058 · 93 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

5.83% (93rd) EPSS

CVSS 6.8 · medium

Is it mine?

7 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-28

A logic issue existed resulting in memory corruption. This was addressed with improved state management. This issue affected versions prior to iOS 12.1.1, tvOS 12.1.1, watchOS 5.1.2, Safari 12.0.2, iTunes 12.9.2 for Windows, iCloud for Windows 7.9.

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

v3.08.3highCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-119USprimary

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-45984WebKit JIT - Int32/Double Arrays can have Proxy Objects in the Prototype Chainsfunctional · exploit_db

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: iOS 12.1.1, tvOS 12.1.1, watchOS 5.1.2, Safari 12.0.2, iTunes 12.9.2 for Windows, iCloud for Windows 7.9enisa_euvdEU
apple icloud< 7.9nvdUScpe:2.3:a:apple:icloud:*:*:*:*:*:*:*:*
apple iphone os< 12.1.1nvdUScpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple itunes< 12.9.2nvdUScpe:2.3:a:apple:itunes:*:*:*:*:*:*:*:*
apple safari< 12.0.2nvdUScpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
apple tvos< 12.1.1nvdUScpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
apple watchos< 5.1.2nvdUScpe: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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+21039 more

references (21)

External citations — patches, advisories, analysis.

scry

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