CVE-2019-8634

Name: CVE-2019-8634
Creator: NVD / NIST
Published: 2019-12-18T18:15:30.647+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.99%

Last modified Jun 17, 2026

CVE-2019-8634 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. An authentication issue was addressed with improved state management. This issue is fixed in macOS Mojave 10.14.5. EPSS estimates a 0.99% chance of exploitation in the next 30 days.

Description

An authentication issue was addressed with improved state management. This issue is fixed in macOS Mojave 10.14.5. A user may be unexpectedly logged in to another user’s account.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

0.99%

57.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Apple	Mac Os X	< 10.12.6
Apple	Mac Os X	< 10.14.5
Apple	Mac Os X	>= 10.13, < 10.13.6
Apple	Mac Os X	10.12.6
Apple	Mac Os X	10.13.6

References

https://support.apple.com/HT210119Vendor Advisory
https://support.apple.com/HT210119Vendor Advisory

Timeline

Published: Dec 18, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-8634?

An authentication issue was addressed with improved state management. This issue is fixed in macOS Mojave 10.14.5. A user may be unexpectedly logged in to another user’s account.

How severe is CVE-2019-8634?

CVE-2019-8634 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.99% probability of exploitation in the next 30 days.

How do I fix CVE-2019-8634?

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-2019-8634?

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

Scan your code now

Source: NVD / NIST