# CVE-2026-34639: Adobe Media Encoder out-of-bounds write

Source: https://junglewise.ai/threats/cve-2026-34639-adobe-media-encoder-out-of-bounds-write  
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-2026-34639 · Severity: high · CVSS 7.8 · Published 2026-05-12

Adobe Media Encoder, a professional video and audio 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. If successful, the attacker could execute unauthorized commands or install software with the same permissions as 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-2026-34639 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-34639 being exploited in the wild.

**How severe is CVE-2026-34639?** High severity, with a CVSS score of 7.8, published 12 May 2026.

**Which products and versions are affected?** Adobe Media Encoder 26.0.2, 25.6.4 and earlier.

**Is there a fix for CVE-2026-34639?** 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-2026-34639 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2026-34639?** 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 out-of-bounds write vulnerability (CWE-787) exists in Adobe Media Encoder versions 26.0.2, 25.6.4 and earlier. The flaw is triggered when the application processes a malformed file, leading to memory corruption. An attacker can leverage this to achieve arbitrary code execution within the security context of the current user. The attack vector is local, requiring a user to manually open a malicious file (User Interaction: Required). Adobe has addressed this in newer versions, and users are advised to update to the latest available releases.

## Affected products

- Adobe Media Encoder 26.0.2, 25.6.4 and earlier

## 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)