CVE-2026-39873
Received
Received - Intake
Memory Corruption in macOS via Malicious SMB Server
Vulnerability report for CVE-2026-39873, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-07-27
Last updated on: 2026-07-27
Assigner: Apple Inc.
Description
Description
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.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| apple | macos_sequoia | to 15.7.8 (inc) |
| apple | macos_sonoma | to 14.8.8 (inc) |
| apple | macos_tahoe | to 26.6 (inc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
