---
id: CVE-2026-86879
title: A denial-of-service issue was addressed with improved input validation
summary: >-
  A denial-of-service issue was addressed with improved input validation. This
  issue is fixed in iOS 27 and iPadOS 27. A remote attacker may be able to cause
  a denial-of-service.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-20
vendor: apple
product: ipados
affected:
  - ipados < 27.0
  - iphone_os < 27.0
patched:
  - ipados 27.0
  - iphone_os 27.0
published: '2026-09-14'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T17:27:38.693'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86879'
references:
  - url: 'https://support.apple.com/en-us/149034'
    label: product-security@apple.com
tags:
  - nvd
  - cve.org
epss: 0.00394
epssPercentile: 0.30713
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-14T22:58:56.086856Z'
ingestedAt: '2026-09-14T21:15:17.551Z'
---

## Overview

A denial-of-service issue was addressed with improved input validation. This issue is fixed in iOS 27 and iPadOS 27. A remote attacker may be able to cause a denial-of-service.

## Affected

- `ipados < 27.0`
- `iphone_os < 27.0`

## Remediation

Upgrade past the affected range:

- `ipados 27.0`
- `iphone_os 27.0`