CVE-2026-21358: Adobe Indesign

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

InDesign Desktop versions 21.1, 20.5.1 and earlier are affected by a Heap-based Buffer Overflow vulnerability that could result in application denial-of-service. An attacker could exploit this vulnerability to crash the application, causing disruption to services. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Affected products

• Adobe Indesign: before 20.5.2 (fixed in 20.5.2); from 21.0, before 21.2 (fixed in 21.2)

Published 2026-02-10. Last modified 2026-08-28.