# CVE-2026-34640: Adobe Media Encoder integer overflow in file processing

Source: https://junglewise.ai/threats/cve-2026-34640-adobe-media-encoder-integer-overflow-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-2026-34640 · Severity: high · CVSS 7.8 · Published 2026-05-12

Adobe Media Encoder, a professional video processing application, is affected by a security flaw that could allow an attacker to take control of a user's system. To exploit this, an attacker must trick a user into opening a specially crafted malicious file. Successful exploitation could lead to unauthorized data access or the installation of malicious software in the context of the logged-in user.

Technologies: [Adobe Media Encoder](https://junglewise.ai/threats/technologies/media-encoder). Vendors: [Adobe](https://junglewise.ai/threats/vendors/adobe).

## Quick answers

**Is CVE-2026-34640 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-34640 being exploited in the wild.

**How severe is CVE-2026-34640?** High severity, with a CVSS score of 7.8, published 12 May 2026.

**Which products and versions are affected?** Adobe Media Encoder <= 25.6.4, 26.0.0 to 26.0.2.

**Is there a fix for CVE-2026-34640?** 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-2026-34640 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2026-34640?** Check whether you run Adobe Media Encoder 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 integer overflow vulnerability (CWE-190) exists in Adobe Media Encoder versions 25.6.4, 26.0.2, and earlier. The flaw occurs during the processing of malformed media files, where improper bounds checking leads to a wraparound condition. An attacker can leverage this to achieve arbitrary code execution with the privileges of the current user. The attack vector is local and requires user interaction, specifically the opening of a malicious file. Adobe has addressed this in newer versions (25.6.5 and 26.2).

## Affected products

- Adobe Media Encoder <= 25.6.4, 26.0.0 to 26.0.2

## Timeline

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

## References

- [https://helpx.adobe.com/security/products/media-encoder/apsb26-47.html](https://helpx.adobe.com/security/products/media-encoder/apsb26-47.html)

## Related threats

- [Adobe Media Encoder incorrect authorization vulnerability](https://junglewise.ai/threats/cve-2026-82002-media-encoder-is-affected-by-an-incorrect-authorization)
- [Adobe Media Encoder out-of-bounds write in file parsing](https://junglewise.ai/threats/cve-2026-113547-media-encoder-is-affected-by-an-out-of-bounds-write)
- [Adobe Media Encoder out-of-bounds write](https://junglewise.ai/threats/cve-2026-113545-media-encoder-is-affected-by-an-out-of-bounds-write)
- [Adobe Media Encoder out-of-bounds write arbitrary code execution](https://junglewise.ai/threats/cve-2026-113543-media-encoder-is-affected-by-an-out-of-bounds-write)
- [Adobe Media Encoder out-of-bounds write in media processing](https://junglewise.ai/threats/cve-2026-113541-media-encoder-is-affected-by-an-out-of-bounds-write)