What is the severity of CVE-2021-39821?

CVE-2021-39821 is considered a critical vulnerability due to its potential for arbitrary code execution.

How do I fix CVE-2021-39821?

To mitigate CVE-2021-39821, users should update Adobe InDesign to version 16.3.2 or later.

What versions of Adobe InDesign are affected by CVE-2021-39821?

CVE-2021-39821 affects Adobe InDesign versions 16.3 and earlier, including version 16.3.1.

What type of vulnerability is CVE-2021-39821?

CVE-2021-39821 is classified as an out-of-bounds read vulnerability.

What user interaction is needed for CVE-2021-39821 exploitation?

Exploitation of CVE-2021-39821 requires the victim to open a specially crafted file.

Vulnerability/
CVE-2021-39821

high

7.8

CWE

125

29/9/2021

23/4/2025

CVE-2021-39821: Adobe InDesign TIF File Parsing Out-Of-Bounds Read Remote Code Execution Vulnerability

First published: Wed Sep 29 2021(Updated: )

Adobe InDesign versions 16.3 (and earlier), and 16.3.1 (and earlier) are affected by an out-of-bounds read vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious TIF file.

Credit: psirt@adobe.com

Affected Software	Affected Version	How to fix
Adobe InDesign 2025	<=16.3.2
macOS
Adobe InDesign 2025	<=16.3
Microsoft Windows Operating System

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Reference Links

https://helpx.adobe.com/security/products/indesign/apsb21-73.html

Frequently Asked Questions

What is the severity of CVE-2021-39821?
CVE-2021-39821 is considered a critical vulnerability due to its potential for arbitrary code execution.
How do I fix CVE-2021-39821?
To mitigate CVE-2021-39821, users should update Adobe InDesign to version 16.3.2 or later.
What versions of Adobe InDesign are affected by CVE-2021-39821?
CVE-2021-39821 affects Adobe InDesign versions 16.3 and earlier, including version 16.3.1.
What type of vulnerability is CVE-2021-39821?
CVE-2021-39821 is classified as an out-of-bounds read vulnerability.
What user interaction is needed for CVE-2021-39821 exploitation?
Exploitation of CVE-2021-39821 requires the victim to open a specially crafted file.

agent/type
agent/severity
agent/weakness
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collector/mitre-cve
source/MITRE
agent/last-modified-date
agent/first-publish-date
agent/event
agent/source
agent/softwarecombine
agent/tags
collector/nvd-index
agent/software-canonical-lookup-request
vendor/adobe
canonical/adobe indesign 2025
version/adobe indesign 2025/16.3.2
vendor/apple
canonical/macos
version/adobe indesign 2025/16.3
vendor/microsoft
canonical/microsoft windows operating system

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