AUGUST 4, 2026
Live Feed
Back to database
Case File

CVE-2020-9866

CRITICAL · CVSS 9.8 EPSS 1.95% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2020-10-27 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.8. Public exploit code or proof-of-concept references have been detected in its references.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
arbitrary code execution code execution

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2020-9866
Severity
CRITICAL
CVSS
9.8
EPSS
1.95%

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)