CVE-2026-21276: Adobe Indesign

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

InDesign Desktop versions 21.0, 19.5.5 and earlier are affected by an Access of Uninitialized Pointer 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 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.