---
id: "CVE-2026-84579"
kind: "vulnerability"
aliases: ["CVE-2026-84579"]
title: "Apple macOS: opening a network-share file may run unexpected software"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "mac-fleet", "macbook", "macos"]
not_affected_if: ["already-patched-macos"]
published_at: "2026-10-20T01:17:23+00:00"
first_seen_at: "2026-10-23T21:57:19+00:00"
updated_at: "2026-10-25T05:06:14+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84579", "first_seen_at": "2026-10-23T21:57:19+00:00"}]
---

# Apple macOS: opening a network-share file may run unexpected software

A logic flaw in macOS lets a file that references a network share cause unexpected software to execute when it is opened. An attacker who can place or point a user at such a file may get code run on the Mac.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the macOS version with `sw_vers -productVersion` and compare it with the fixed releases listed in the sources
- unknown for any other check, as the sources do not say

## Fix

- Update macOS to `27` (Golden Gate), `15.8` (Sequoia) or `26.7` (Tahoe) or later, as the sources list these as fixed releases

## Timeline

- 2026-10-23T21:57:19+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-84579

## From the sources

A logic issue was addressed with improved checks. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Opening a file referencing a network share may lead to unexpected software execution.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_