What is CVE-2019-8757?

CVE-2019-8757 is a low-severity vulnerability in Apple macOS, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 2.5/10. Published 2019-12-18.

How severe is CVE-2019-8757?

Low severity. CVSS v3 base score is 2.5 out of 10.

Vulnerability in Apple macOS

CVE-2019-8757

A race condition existed when reading and writing user preferences. This was addressed with improved state handling. This issue is fixed in macOS Catalina 10.15. The "Share Mac Analytics" setting may not be disabled when a user deselects the switch to share analytics.

Vulnerability class: Race Condition

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

CVSS v3 metric

CVSS v3 base score 2.5 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (7.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Apple macOS — versions unspecified
Apple Mac OS X

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

support.apple.com/HT210634 (Vendor Advisory)

Frequently asked questions

What is CVE-2019-8757?: CVE-2019-8757 is a low-severity vulnerability in Apple macOS, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 2.5/10. Published 2019-12-18.
How severe is CVE-2019-8757?: Low severity. CVSS v3 base score is 2.5 out of 10.