# CVE-2026-34661: Adobe Illustrator out-of-bounds write in file processing

Source: https://junglewise.ai/threats/cve-2026-34661-adobe-illustrator-out-of-bounds-write-in-file-processing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-12. Updated: 2026-05-14  
License: CC BY 4.0 with a link back

CVE-2026-34661 · Severity: high · CVSS 7.8 · Published 2026-05-12

Adobe Illustrator, a professional graphic design application, 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. Successful exploitation could lead to unauthorized data access or the installation of malicious software on the victim's system.

Technologies: [Adobe Illustrator](https://junglewise.ai/threats/technologies/illustrator). Vendors: [Adobe](https://junglewise.ai/threats/vendors/adobe).

## Quick answers

**Is CVE-2026-34661 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-34661 being exploited in the wild.

**How severe is CVE-2026-34661?** High severity, with a CVSS score of 7.8, published 12 May 2026.

**Which products and versions are affected?** Adobe Illustrator 29.8.6 and earlier, 30.3 and earlier.

**Is there a fix for CVE-2026-34661?** 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-2026-34661 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2026-34661?** Check whether you run Adobe Illustrator 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

An out-of-bounds write vulnerability (CWE-787) exists in Adobe Illustrator versions 29.8.6, 30.3, and earlier. The flaw occurs during the processing of specially crafted files, where the application writes data past the end of an intended buffer. This is a local attack vector that requires user interaction, specifically the opening of a malicious file by the victim. If successfully exploited, an attacker could achieve arbitrary code execution in the context of the current user. Adobe has addressed this in updated versions (29.8.7 and 30.4).

## Affected products

- Adobe Illustrator 29.8.6 and earlier, 30.3 and earlier

## Timeline

- 2026-05-12: disclosed
- 2026-05-12: advisory

## References

- [https://helpx.adobe.com/security/products/illustrator/apsb26-51.html](https://helpx.adobe.com/security/products/illustrator/apsb26-51.html)

## Related threats

- [Adobe Illustrator out-of-bounds write vulnerability](https://junglewise.ai/threats/cve-2026-75992-adobe-illustrator-out-of-bounds-write-vulnerability)
- [Adobe Illustrator improper input validation in file parsing](https://junglewise.ai/threats/cve-2026-75991-adobe-illustrator-improper-input-validation-in-file-parsing)
- [Adobe Illustrator incorrect authorization arbitrary code execution](https://junglewise.ai/threats/cve-2026-75990-adobe-illustrator-incorrect-authorization-arbitrary-code)
- [Adobe Illustrator out-of-bounds read in file parsing](https://junglewise.ai/threats/cve-2026-71441-adobe-illustrator-out-of-bounds-read-in-file-parsing)
- [Adobe Illustrator out-of-bounds write in file processing](https://junglewise.ai/threats/cve-2026-48337-adobe-illustrator-out-of-bounds-write-in-file-processing)