CVE-2021-39821: Adobe Indesign

High severity, CVSS 7.8. EPSS: 4% chance of exploitation in the next 30 days.

Adobe InDesign versions 16.3 (and earlier), and 16.3.1 (and earlier) are affected by an out-of-bounds read vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious TIF file.

Affected products

• Adobe Indesign: up to and including 16.3.2; up to and including 16.3

Published 2021-09-29. Last modified 2026-06-17.