Adobe Security Bulletin

Last updated on Jan 13, 2026

Security Update Available for Adobe InDesign | APSB26-02

Bulletin ID	Date Published	Priority
APSB26-02	January 13, 2026	3

Summary

Adobe has released a security update for Adobe InDesign.  This update addresses critical and important vulnerabilities that could lead to arbitrary code execution and memory exposure.

Adobe is not aware of any exploits in the wild for any of the issues addressed in these updates.

Affected Versions

Product	Affected version	Platform
Adobe InDesign	ID21.0 and earlier versions	Windows and macOS
Adobe InDesign	ID19.5.5 and earlier versions	Windows and macOS

Solution

Adobe categorizes these updates with the following priority rating and recommends users update their software installations via the Creative Cloud desktop app updater, or by navigating to the InDesign Help menu and clicking "Updates." For more information, please reference this help page.

Product	Updated version	Platform	Priority rating
Adobe InDesign	ID21.1	Windows and macOS	3
Adobe InDesign	ID20.5.1	Windows and macOS	3

For managed environments, IT administrators can use the Creative Cloud Packager to create deployment packages. Refer to this help page for more information.

Vulnerability Details

Vulnerability Category	Vulnerability Impact	Severity	CVSS base score	CVSS vector	CVE Number
Access of Uninitialized Pointer (CWE-824)	Arbitrary code execution	Critical	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	CVE-2026-21275
Access of Uninitialized Pointer (CWE-824)	Arbitrary code execution	Critical	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	CVE-2026-21276
Heap-based Buffer Overflow (CWE-122)	Arbitrary code execution	Critical	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	CVE-2026-21277
Heap-based Buffer Overflow (CWE-122)	Arbitrary code execution	Critical	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	CVE-2026-21304
Out-of-bounds Read (CWE-125)	Memory exposure	Important	5.5	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N	CVE-2026-21278

Acknowledgments

Adobe would like to thank the following researchers for reporting these issues and for working with Adobe to help protect our customers:   

Francis Provencher (prl) -- CVE-2026-21275, CVE-2026-21276, CVE-2026-21277, CVE-2026-21278
yjdfy -- CVE-2026-21304

NOTE: Adobe has a public bug bounty program with HackerOne. If you are interested in working with Adobe as an external security researcher, please check out https://hackerone.com/adobe

For more information, visit https://helpx.adobe.com/security.html, or email PSIRT@adobe.com

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