Heap-based Buffer Overflow in InDesign Desktop by Adobe
CVE-2026-21304

7.8HIGH

Key Information:

Vendor

Adobe
Status
Indesign Desktop
Vendor
CVE Published:
13 January 2026

What is CVE-2026-21304?

A Heap-based Buffer Overflow vulnerability in Adobe InDesign Desktop versions 21.0 and 19.5.5, along with earlier releases, may allow for arbitrary code execution if a user opens a specially crafted malicious file. Successful exploitation necessitates direct user interaction, emphasizing the importance of cautious behavior while handling unknown documents.

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Affected Version(s)

InDesign Desktop 0 <= 19.5.5

References

https://helpx.adobe.com/security/products/indesign/apsb26...
vendor-advisory

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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