What is CVE-2026-21304?

CVE-2026-21304 is a high-severity vulnerability in Adobe Indesign Desktop, classified under Heap-based Buffer Overflow. CVSS score: 7.8/10. Published 2026-01-13.

How severe is CVE-2026-21304?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Adobe Indesign Desktop

CVE-2026-21304

InDesign Desktop versions 21.0, 19.5.5 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 intera…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (15.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Adobe Indesign Desktop — versions 0

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

helpx.adobe.com/security/products/indesign/apsb26-02.html (vendor-advisory)

Frequently asked questions

What is CVE-2026-21304?: CVE-2026-21304 is a high-severity vulnerability in Adobe Indesign Desktop, classified under Heap-based Buffer Overflow. CVSS score: 7.8/10. Published 2026-01-13.
How severe is CVE-2026-21304?: High severity. CVSS v3 base score is 7.8 out of 10.