What is CVE-2019-8705?

CVE-2019-8705 is a medium-severity vulnerability in Apple macOS, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2019-12-18.

How severe is CVE-2019-8705?

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

Buffer overflow in Apple macOS

CVE-2019-8705

A memory corruption issue was addressed with improved validation. This issue is fixed in macOS Catalina 10.15, tvOS 13. Processing a maliciously crafted movie may result in the disclosure of process memory.

Vulnerability class: Buffer Overflow

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:N/UI:R/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.4th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Apple macOS — versions unspecified
Apple Mac OS X
Apple tvOS — versions unspecified

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

support.apple.com/kb/HT210722 (Release Notes, Vendor Advisory)
support.apple.com/HT210634 (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2019-8705?: CVE-2019-8705 is a medium-severity vulnerability in Apple macOS, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2019-12-18.
How severe is CVE-2019-8705?: Medium severity. CVSS v3 base score is 5.5 out of 10.