---
id: CVE-2026-21278
title: >-
  InDesign Desktop versions 21.0, 19.5.5 and earlier are affected by an
  Out-of-bounds Read vulnerability that could lead to memory exposure
summary: >-
  InDesign Desktop versions 21.0, 19.5.5 and earlier are affected by an
  Out-of-bounds Read vulnerability that could lead to memory exposure. An
  attacker could leverage this vulnerability to access sensitive information
  stored in memory. Ex…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N'
cwe:
  - CWE-125
vendor: adobe
product: indesign
affected:
  - indesign < 20.5.1
  - 'indesign >= 21.0, < 21.1'
patched:
  - indesign 21.1
published: '2026-01-13'
updated: '2026-08-27'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-21278'
references:
  - url: 'https://helpx.adobe.com/security/products/indesign/apsb26-02.html'
    label: psirt@adobe.com
tags:
  - nvd
epss: 0.00222
epssPercentile: 0.11363
ingestedAt: '2026-08-27T21:08:14.554Z'
---

## Overview

InDesign Desktop versions 21.0, 19.5.5 and earlier are affected by an Out-of-bounds Read vulnerability that could lead to memory exposure. An attacker could leverage this vulnerability to access sensitive information stored in memory. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

## Affected

- `indesign < 20.5.1`
- `indesign >= 21.0, < 21.1`

## Remediation

Upgrade past the affected range:

- `indesign 21.1`