CVE-2026-34698: InDesign Desktop | Heap-based Buffer Overflow (CWE-122)

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-09 · updated 2026-08-28
Weakness: CWE-122

Description

InDesign Desktop versions 21.3, 20.5.3 and earlier are affected by a Heap-based Buffer Overflow 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 Desktop: before 20.5.4; from 21.0 before 21.4 — fixed in 20.5.4, 21.4

How to fix

Upgrade to a fixed version: Adobe InDesign Desktop 20.5.4, 21.4. Check the vendor advisory for mitigations.

References

https://helpx.adobe.com/security/products/indesign/apsb26-58.html

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