CVE-2026-21278: Adobe Indesign

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

InDesign Desktop versions 21.0, 19.5.5 and earlier are affected by an Out-of-bounds Read vulnerability that could lead to memory exposure. An attacker could leverage this vulnerability to access sensitive information stored in memory. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Affected products

• Adobe Indesign: before 20.5.1 (fixed in 20.5.1); from 21.0, before 21.1 (fixed in 21.1)

Published 2026-01-13. Last modified 2026-08-28.