CVE-2026-21304

Unknown Unknown - Not Provided

Heap-Based Buffer Overflow in Adobe InDesign Enables Code Execution

Publication date: 2026-01-13

Last updated on: 2026-01-13

Assigner: Adobe Systems Incorporated

Description

InDesign Desktop versions 21.0, 19.5.5 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

Probability:
Percentile:

Meta Information

Published

2026-01-13

Last Modified

2026-01-13

Generated

2026-07-06

AI Q&A

2026-01-14

EPSS Evaluated

2026-07-05

NVD

CVE-2026-21304

EUVD

EUVD-2026-2055

Affected Vendors & Products

Vendor	Product	Version / Range
adobe	indesign	21.0
adobe	indesign	to 19.5.5 (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

Executive Summary

This vulnerability is a Heap-based Buffer Overflow in Adobe InDesign Desktop versions 21.0, 19.5.5 and earlier. It can allow an attacker to execute arbitrary code with the privileges of the current user. Exploitation requires the user to open a malicious file.

Impact Analysis

If exploited, this vulnerability could allow an attacker to run arbitrary code on your system with your user privileges, potentially leading to unauthorized actions such as data theft, system compromise, or further malware installation. However, exploitation requires user interaction by opening a malicious file.

Mitigation Strategies

To mitigate this vulnerability, avoid opening files from untrusted or unknown sources, as exploitation requires user interaction by opening a malicious file. Additionally, ensure that your Adobe InDesign Desktop software is updated to a version later than 21.0 or 19.5.5 where this vulnerability is fixed.

Hi! I’m here to help you understand CVE-2026-21304. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70