---
id: CVE-2026-21358
title: >-
  InDesign Desktop versions 21.1, 20.5.1 and earlier are affected by a
  Heap-based Buffer Overflow vulnerability that could result in application
  denial-of-service
summary: >-
  InDesign Desktop versions 21.1, 20.5.1 and earlier are affected by a
  Heap-based Buffer Overflow vulnerability that could result in application
  denial-of-service. An attacker could exploit this vulnerability to crash the
  application, caus…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-122
  - CWE-787
vendor: adobe
product: indesign
affected:
  - indesign < 20.5.2
  - 'indesign >= 21.0, < 21.2'
patched:
  - indesign 21.2
published: '2026-02-10'
updated: '2026-08-27'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-21358'
references:
  - url: 'https://helpx.adobe.com/security/products/indesign/apsb26-17.html'
    label: psirt@adobe.com
tags:
  - nvd
epss: 0.0016
epssPercentile: 0.04371
ingestedAt: '2026-08-27T21:08:16.632Z'
---

## Overview

InDesign Desktop versions 21.1, 20.5.1 and earlier are affected by a Heap-based Buffer Overflow vulnerability that could result in application denial-of-service. An attacker could exploit this vulnerability to crash the application, causing disruption to services. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

## Affected

- `indesign < 20.5.2`
- `indesign >= 21.0, < 21.2`

## Remediation

Upgrade past the affected range:

- `indesign 21.2`