CVE-2019-8660

highpriority · attend · 54EPSS 0.138 · 96 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

13.8% (96th) EPSS

CVSS 7.5 · high

Is it mine?

8 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-26

A memory corruption issue was addressed with improved input validation. This issue is fixed in iOS 12.4, macOS Mojave 10.14.6, tvOS 12.4, watchOS 5.3. A remote attacker may be able to cause unexpected application termination or arbitrary code execution.

cvss

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

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.3criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimary

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-47193iMessage - Memory Corruption when Decoding NSKnownKeysDictionary1functional · exploit_db

affected products (8)

Products and version ranges known to be affected.

Apple IOSunspecified → iOS 12.4enisa_euvdEU
Apple macOSunspecified → macOS Mojave 10.14.6enisa_euvdEU
Apple tvOSunspecified → tvOS 12.4enisa_euvdEU
Apple watchOSunspecified → watchOS 5.3enisa_euvdEU
apple iphone os< 12.4nvdUScpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple mac os x< 10.14.6nvdUScpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
apple tvos< 12.4nvdUScpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
apple watchos< 5.3nvdUScpe: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 2019-12-18modified 2026-06-17

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+16107 more

references (35)

External citations — patches, advisories, analysis.

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