Out-of-bounds read in Adobe InDesign - CVE-2026-21278
Published: January 15, 2026
Vulnerability identifier: #VU121548
CSH Severity: Medium
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-21278
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger an out-of-bounds read error and read contents of memory on the system.
Affected software
Adobe InDesign
How to mitigate CVE-2026-21278
Install updates from vendor's website.
Adobe InDesign - addressed in versions 20.5.1, 21.1