What is CVE-2019-8851?

CVE-2019-8851 is a high-severity vulnerability in Apple macOS. CVSS score: 7.5/10. Published 2020-10-27.

How severe is CVE-2019-8851?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Apple macOS

CVE-2019-8851

A logic issue was addressed with improved state management. This issue is fixed in macOS Catalina 10.15.2, Security Update 2019-002 Mojave, and Security Update 2019-007 High Sierra. A Mac may not lock immediately upon wake.

Published 2020-10-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.6th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Apple macOS — versions unspecified
Apple Mac OS X

References

support.apple.com/en-us/HT210788 (Vendor Advisory)

Frequently asked questions

What is CVE-2019-8851?: CVE-2019-8851 is a high-severity vulnerability in Apple macOS. CVSS score: 7.5/10. Published 2020-10-27.
How severe is CVE-2019-8851?: High severity. CVSS v3 base score is 7.5 out of 10.