#202020

Adobe Security Bulletin

Last updated on Jun 9, 2026

Security Update Available for Adobe InCopy | APSB26-59

Bulletin ID
Date published
Priority
APSB26-59
June 9, 2026
3

Summary

Adobe has released a security update for Adobe InCopy. This update addresses critical vulnerabilities that could lead to arbitrary code execution.

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 InCopy
21.3 and earlier versions
Windows and macOS
Adobe InCopy
20.5.3 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 InCopy Help menu and clicking "Updates." For more information, please reference this help page.

Product
Updated version
Platform
Priority rating
Adobe InCopy
21.4
Windows and macOS
3
Adobe InCopy
20.5.4
Windows and macOS
3

Vulnerability Details

Vulnerability category
Vulnerability impact
Severity
CVSS base score
CVSS vector
CVE number
Out-of-bounds Write (CWE-787)
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-2026-34706
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-2026-34707
Stack-based Buffer Overflow (CWE-121)
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-2026-34708

Acknowledgments

Adobe would like to thank the following researchers for reporting this issue and for working with Adobe to help protect our customers.

  • jony_juice -- CVE-2026-34706, CVE-2026-34707, CVE-2026-34708

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

For more information, visit https://www.adobe.com/trust/security/bug-bounty.html, or email PSIRT@adobe.com