VULNERABILITY INTELLIGENCE

CVE-2020-9866

CVSS score9.8 CRITICAL

EPSS probability1.95%

CISA KEVNot currently listed

Published2020-10-27

Last modified2026-06-17

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

Description

A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra. A buffer overflow may result in arbitrary code execution.

Weakness classification

nvd@nist.gov: CWE-120

Primary references

product-security@apple.com — Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Vendor Advisory