# CVE-2026-84396: Adobe InDesign Desktop NULL pointer dereference

Source: https://junglewise.ai/threats/cve-2026-84396-indesign-desktop-is-affected-by-a-null-pointer-dereference  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-22. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-84396 · Severity: medium · CVSS 5.5 · Published 2026-09-22

Adobe InDesign is a professional layout and design application used by publishers and creative teams. This vulnerability could cause InDesign to crash when a user opens a specially crafted malicious file, disrupting work and preventing document editing temporarily. The flaw requires user interaction and does not allow remote execution or data theft, but can be used to cause a denial-of-service condition.

Technologies: [Adobe InDesign Desktop](https://junglewise.ai/threats/technologies/indesign). Vendors: [Adobe](https://junglewise.ai/threats/vendors/adobe).

## Quick answers

**Is CVE-2026-84396 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-84396 being exploited in the wild.

**How severe is CVE-2026-84396?** Medium severity, with a CVSS score of 5.5, published 22 September 2026.

**Which products and versions are affected?** Adobe InDesign Desktop.

**Is there a fix for CVE-2026-84396?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-84396 attacked?** It is attacked with local access, in a web application.

**Am I affected by CVE-2026-84396?** Check whether you run Adobe InDesign Desktop. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

InDesign is affected by a NULL pointer dereference vulnerability in document file handling. The vulnerability requires user interaction—specifically opening a malicious document file—to trigger the crash. Exploitation results in an application denial-of-service with no elevation of privilege or data compromise.

## Affected products

- Adobe InDesign Desktop

## Timeline

- 2026-09-22: disclosed

## References

- [https://helpx.adobe.com/security/products/indesign/apsb26-145.html](https://helpx.adobe.com/security/products/indesign/apsb26-145.html)

## Related threats

- [Adobe InDesign Desktop null pointer dereference](https://junglewise.ai/threats/cve-2026-76192-indesign-desktop-is-affected-by-a-null-pointer-dereference)
- [Adobe InDesign heap overflow in file processing](https://junglewise.ai/threats/cve-2026-34699-adobe-indesign-heap-overflow-in-file-processing)
- [Adobe InDesign Desktop heap buffer overflow](https://junglewise.ai/threats/cve-2026-21358-adobe-indesign-desktop-heap-buffer-overflow)
- [Adobe InDesign Desktop heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-21357-adobe-indesign-desktop-heap-based-buffer-overflow)
- [Adobe InDesign Desktop heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-21304-adobe-indesign-desktop-heap-based-buffer-overflow)