Stack-based buffer overflow in InCopy - CVE-2026-34708
Published: August 26, 2026
Vulnerability identifier: #VU145821
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-34708
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to stack-based buffer overflow in Adobe InCopy when parsing crafted content. A remote attacker can trick the victim into opening specially crafted content to execute arbitrary code.
User interaction is required to open crafted content.
Affected software
InCopy
How to mitigate CVE-2026-34708
Install security update from vendor's website.
InCopy - addressed in versions 20.5.4, 21.4