Memory Handling Vulnerability in Apple's macOS Products
CVE-2026-39873

Currently unrated

Key Information:

Vendor: Apple
Status: Mac OS
Vendor: CVE Published:; 27 July 2026

What is CVE-2026-39873?

A memory handling flaw exists within Apple's macOS products that can be exploited when connecting to a malicious SMB server. This vulnerability may cause unexpected system terminations, disrupting user experience and system stability. Apple has addressed this issue in the latest updates for macOS Sequoia, Sonoma, and Tahoe. Users are encouraged to update their systems to mitigate any risks associated with this vulnerability.

Affected Version(s)

macOS 0 < 14.8.8

macOS 0 < 15.7.8

macOS 0 < 26.6

References

https://support.apple.com/en-us/128067

https://support.apple.com/en-us/128071

https://support.apple.com/en-us/128072

Download the Critical Vulnerability Management Cheat Sheet

Timeline

Vulnerability published
Jul 27, 2026
Vulnerability Reserved
Apr 7, 2026

CVE-2026-39873 Data

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