---
id: CVE-2026-28967
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 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4. An
  attacker in a privileged network position may be able to cause a
  denial-of-service.
severity: medium
cvss: 4.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'
cvssSource: adp
vendor: Apple
product: iOS and iPadOS
affected:
  - ios_and_ipados < 18.7.7
  - ios_and_ipados < 26.4
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-05-12T17:24:42.919430Z'
published: '2026-05-11'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T20:39:42.303Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-28967'
references:
  - url: 'https://support.apple.com/en-us/126792'
  - url: 'https://support.apple.com/en-us/126793'
tags:
  - cve.org
epss: 0.0032
epssPercentile: 0.24793
ingestedAt: '2026-10-27T16:11:58.973Z'
---

## Overview

A denial-of-service issue was addressed with improved input validation. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4. An attacker in a privileged network position may be able to cause a denial-of-service.

## Affected

- `ios_and_ipados < 18.7.7`
- `ios_and_ipados < 26.4`

## Remediation

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