Which products and versions are affected by CVE-2019-8526?

Affected: Mac OS X (Apple); macOS versions >= unspecified. The full list is in the CVE brief.

Is CVE-2019-8526 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jan 25, 2022.

Is CVE-2019-8526 in the CISA KEV catalog?

Yes. It was added on Apr 17, 2023 with a federal remediation due date of May 8, 2023.

Is there a public exploit for CVE-2019-8526?

Public exploit code is available.

Is there a fix for CVE-2019-8526?

Fixed versions are available, including Mac OS X 10.14.4, macOS macOS Mojave 10.14.4.

How urgently should CVE-2019-8526 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2019-8526

HighExploitedPublic exploit

A use after free issue was addressed with improved memory management.

Published Dec 18, 2019 · Updated Oct 23, 2025

Key Facts

Patch immediately

CVE-2019-8526 is a high-severity vulnerability (CVSS 7.8 v3.1) affecting Mac OS X (Apple), macOS.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jan 25, 2022. Public exploit code is available.
EPSS estimates a 0.7% probability of exploitation in the next 30 days.
Fixed versions are available, including Mac OS X 10.14.4, macOS macOS Mojave 10.14.4.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

7.8

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

EPSS (30-day exploit likelihood)

0.7%

Higher than 52.2% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2019-8526 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

A use after free issue was addressed with improved memory management. This issue is fixed in macOS Mojave 10.14.4. An application may be able to gain elevated privileges.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	Apr 17, 2023	May 8, 2023	Not reported
Industry KEV feed	Jan 25, 2022	May 8, 2023	Not reported
CIRCL KEV	Apr 17, 2023	May 8, 2023	Not reported
ENISA EUVD	Apr 17, 2023	n/a	Not reported

Required action: Apply updates per vendor instructions.

Affected Products

2 affected entries in total

Product	Affected versions	Fixed in
Mac OS XApple	See advisory	10.14.4
macOS	>= unspecified	macOS Mojave 10.14.4

Patched Releases

Mac OS X

10.14.4

macOS

macOS Mojave 10.14.4

Timeline

Publicly disclosed
Dec 18, 2019
Added to Industry KEV feed
Jan 25, 2022
Added to CISA KEV
Apr 17, 2023
Added to CIRCL KEV
Apr 17, 2023
Added to ENISA EUVD
Apr 17, 2023
Last updated
Oct 23, 2025

Weakness Type

CWE-416 Use After Free

References

advisoryhttps://support.apple.com/HT209600
exploitVulnCheck exploitation report
exploitVulnCheck exploitation report
exploitVulnCheck exploitation report
exploitVulnCheck exploitation report

1 more references in the full CVE brief

FAQ

Common Questions.

A use after free issue was addressed with improved memory management.
Affected: Mac OS X (Apple); macOS versions >= unspecified. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jan 25, 2022.
Yes. It was added on Apr 17, 2023 with a federal remediation due date of May 8, 2023.
Public exploit code is available.
Fixed versions are available, including Mac OS X 10.14.4, macOS macOS Mojave 10.14.4.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Is CVE-2019-8526 Running On Your Attack Surface?

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