---
id: "CVE-2026-86921"
kind: "vulnerability"
aliases: ["CVE-2026-86921"]
title: "Apple iOS and macOS: permissions flaw lets local attacker overwrite restricted files"
severity: "medium"
cvss: 6.2
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["apple-devices", "infrastructure", "ios", "ipados", "macos", "visionos"]
not_affected_if: []
published_at: "2026-10-20T01:17:27+00:00"
first_seen_at: "2026-10-23T21:57:19+00:00"
updated_at: "2026-10-25T04:02:06+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86921", "first_seen_at": "2026-10-23T21:57:19+00:00"}]
---

# Apple iOS and macOS: permissions flaw lets local attacker overwrite restricted files

A permissions check in Apple's operating systems was fixed in iOS 26.7, iPadOS 26.7, iOS 27, iPadOS 27, macOS Golden Gate 27 and visionOS 27. A local attacker may be able to overwrite files they should not be able to change.

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

## How to check

- unknown

## Fix

- Update iOS and iPadOS to `26.7` or later, or to `27` or later.
- Update macOS Golden Gate to `27` or later, and visionOS to `27` or later.

## Timeline

- 2026-10-23T21:57:19+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-86921

## From the sources

A permissions issue was addressed with improved validation. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, visionOS 27. A local attacker may be able to overwrite restricted files.

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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_