CVE-2018-4344

Name: CVE-2018-4344
Creator: NVD / NIST
Published: 2019-04-03T18:29:09.173+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10Actively ExploitedEPSS 2.92%

Last modified Jun 17, 2026

CVE-2018-4344 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5.. CISA has confirmed active exploitation in the wild. EPSS estimates a 2.92% chance of exploitation in the next 30 days.

Description

A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

2.92%

85.3th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Jul 18, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apple	Iphone Os	< 12.0
Apple	Mac Os X	< 10.14
Apple	Tvos	< 12.0
Apple	Watchos	< 5.0

References

https://support.apple.com/kb/HT209106Release Notes, Vendor Advisory
https://support.apple.com/kb/HT209107Release Notes, Vendor Advisory
https://support.apple.com/kb/HT209108Release Notes, Vendor Advisory
https://support.apple.com/kb/HT209139Release Notes, Vendor Advisory
https://support.apple.com/kb/HT209106Release Notes, Vendor Advisory
https://support.apple.com/kb/HT209107Release Notes, Vendor Advisory
https://support.apple.com/kb/HT209108Release Notes, Vendor Advisory
https://support.apple.com/kb/HT209139Release Notes, Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-4344US Government Resource

Timeline

Published: Apr 3, 2019
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2018-4344?

A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5.

How severe is CVE-2018-4344?

CVE-2018-4344 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 2.92% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2018-4344?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-4344?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST