CVE-2026-34701

Analyzed Analyzed - Analysis Complete

Heap-based Buffer Overflow in Adobe InDesign

Publication date: 2026-06-09

Last updated on: 2026-06-10

Assigner: Adobe Systems Incorporated

Description

InDesign Desktop versions 21.3, 20.5.3 and earlier are affected by a Heap-based Buffer Overflow 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 file.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-06-09

Last Modified

2026-06-10

Generated

2026-06-30

AI Q&A

2026-06-10

EPSS Evaluated

2026-06-28

NVD

CVE-2026-34701

EUVD

EUVD-2026-35784

Affected Vendors & Products

Vendor	Product	Version / Range
adobe	indesign	to 20.5.4 (exc)
adobe	indesign	From 21.0 (inc) to 21.4 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

Mitigation Strategies

To mitigate this vulnerability, avoid opening malicious files in affected versions of Adobe InDesign Desktop (versions 21.3, 20.5.3 and earlier). Since exploitation requires user interaction by opening a malicious file, exercising caution with files from untrusted sources is critical.

Additionally, consider updating Adobe InDesign Desktop to a version later than 21.3 or 20.5.3 once a patch is available to address this heap-based buffer overflow vulnerability.

Executive Summary

This vulnerability is a Heap-based Buffer Overflow found in Adobe InDesign Desktop versions 21.3, 20.5.3, and earlier. It occurs when a user opens a specially crafted malicious file, which can cause the program to overwrite parts of memory improperly.

As a result, an attacker could execute arbitrary code within the context of the current user, potentially taking control of the affected system.

Exploitation requires user interaction, meaning the victim must open the malicious file for the attack to succeed.

Impact Analysis

If exploited, this vulnerability can allow an attacker to execute arbitrary code on your system with the same privileges as the current user.

This could lead to unauthorized actions such as installing malware, stealing data, or modifying files.

Because exploitation requires opening a malicious file, users must be cautious about files received from untrusted sources.

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