Vulnerability · NVD

CVE-2026-39873

CVE-2026-39873 : critical severity (CVSS 9.8). No tracked catalog app is linked to this CVE.

Severity (CVSS): 9.8
Exploitation: 0.6 %
Tracked apps: 0
Still exposed: 0

Published on 2026-07-27

The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Connecting to a malicious SMB server may lead to unexpected system termination.

Attack vector : Network No privileges required No user interaction

Show raw CVSS vector

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

EPSS 0.59% exploit very unlikely percentile 45.6%

OS versions that fix this CVE

This CVE is resolved by the following OS security releases. Update the OS to at least the listed version.

macOS Fixed in 26.6 15.7.8 14.8.8

View on NVD ↗ Advisory · support.apple.com

Manage your fleet with Appaloosa

Appaloosa pushes OS updates, apps and policies to your Windows, macOS, iOS and Android devices from one console.

Discover Appaloosa MDM