---
id: CVE-2026-86963
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 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27. An attacker
  in a privileged network position may be able to cause a denial-of-service.
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: adp
vendor: Apple
product: iOS and iPadOS
affected:
  - ios_and_ipados < 26.7
  - ios_and_ipados < 27
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-20T10:12:56.854736Z'
published: '2026-10-20'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T20:39:40.420Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-86963'
references:
  - url: 'https://support.apple.com/en-us/149034'
  - url: 'https://support.apple.com/en-us/149041'
tags:
  - cve.org
epss: 0.00341
epssPercentile: 0.27471
ingestedAt: '2026-10-20T01:49:42.585Z'
---

## Overview

A denial-of-service issue was addressed with improved input validation. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27. An attacker in a privileged network position may be able to cause a denial-of-service.

## Affected

- `ios_and_ipados < 26.7`
- `ios_and_ipados < 27`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.