What is CVE-2019-8537?

CVE-2019-8537 is a medium-severity vulnerability in Apple macOS. CVSS score: 5.5/10. Published 2019-12-18.

How severe is CVE-2019-8537?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Apple macOS

CVE-2019-8537

An access issue was addressed with improved memory management. This issue is fixed in macOS Mojave 10.14.4. A local user may be able to view a user’s locked notes.

Published 2019-12-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (23.3th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Apple macOS — versions unspecified
Apple Mac OS X

References

support.apple.com/HT209600 (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2019-8537?: CVE-2019-8537 is a medium-severity vulnerability in Apple macOS. CVSS score: 5.5/10. Published 2019-12-18.
How severe is CVE-2019-8537?: Medium severity. CVSS v3 base score is 5.5 out of 10.