# CVE-2026-34699: Adobe InDesign heap overflow in file processing

Source: https://junglewise.ai/threats/cve-2026-34699-adobe-indesign-heap-overflow-in-file-processing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-09. Updated: 2026-06-09  
License: CC BY 4.0 with a link back

CVE-2026-34699 · Severity: high · CVSS 7.8 · Published 2026-06-09

Adobe InDesign, a professional desktop publishing software, is affected by a security flaw that could allow an attacker to take control of a user's computer. To exploit this, an attacker would need to trick a user into opening a specially crafted malicious file. If successful, the attacker could run unauthorized commands or software with the same permissions as the logged-in user, potentially leading to data theft or system compromise.

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

## Quick answers

**Is CVE-2026-34699 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-34699 being exploited in the wild.

**How severe is CVE-2026-34699?** High severity, with a CVSS score of 7.8, published 9 June 2026.

**Which products and versions are affected?** Adobe InDesign Desktop 21.3, 20.5.3 and earlier versions.

**Is there a fix for CVE-2026-34699?** 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-2026-34699 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2026-34699?** Check whether you run Adobe InDesign Desktop at an affected version. 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

A heap-based buffer overflow vulnerability (CWE-122) exists in Adobe InDesign Desktop versions 21.3, 20.5.3 and earlier. The flaw is triggered when the application improperly handles memory during the processing of a specially crafted file. An attacker can exploit this by convincing a victim to open a malicious document, leading to arbitrary code execution in the context of the current user. The attack vector is local, requiring user interaction (UI:R) but no prior privileges (PR:N). Adobe has addressed this issue in updated versions of the software.

## Affected products

- Adobe InDesign Desktop 21.3, 20.5.3 and earlier versions

## Timeline

- 2026-06-09: advisory: Adobe published security bulletin APSB26-58
- 2026-06-09: disclosed

## References

- [https://helpx.adobe.com/security/products/indesign/apsb26-58.html](https://helpx.adobe.com/security/products/indesign/apsb26-58.html)

## Related threats

- [Adobe InDesign Desktop NULL pointer dereference](https://junglewise.ai/threats/cve-2026-84396-indesign-desktop-is-affected-by-a-null-pointer-dereference)
- [Adobe InDesign Desktop null pointer dereference](https://junglewise.ai/threats/cve-2026-76192-indesign-desktop-is-affected-by-a-null-pointer-dereference)
- [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)