# CVE-2026-21271: Adobe Dreamweaver improper input validation arbitrary code execution

Source: https://junglewise.ai/threats/cve-2026-21271-adobe-dreamweaver-improper-input-validation-arbitrary-code  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-01-13. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-21271 · Severity: high · CVSS 8.6 · Published 2026-01-13

Adobe Dreamweaver is a web design and development application used by designers and developers to create websites and web applications. Versions 21.6 and earlier contain an input validation flaw that allows attackers to execute arbitrary code with the privileges of the user running Dreamweaver. An attacker must trick a user into opening a specially crafted malicious file to trigger the exploit.

Technologies: [Adobe Dreamweaver](https://junglewise.ai/threats/technologies/dreamweaver), [Apple macOS](https://junglewise.ai/threats/technologies/macos), [Microsoft Windows](https://junglewise.ai/threats/technologies/windows). Vendors: [Adobe](https://junglewise.ai/threats/vendors/adobe), [Apple](https://junglewise.ai/threats/vendors/apple), [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-21271 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-21271 being exploited in the wild.

**How severe is CVE-2026-21271?** High severity, with a CVSS score of 8.6, published 13 January 2026.

**Which products and versions are affected?** Adobe Dreamweaver 21.6 and earlier.

**Is there a fix for CVE-2026-21271?** 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-2026-21271 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-21271?** Check whether you run Adobe Dreamweaver, Apple macOS or Microsoft Windows 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

Dreamweaver Desktop versions 21.6 and earlier are vulnerable to improper input validation that fails to adequately sanitize user-supplied input, leading to arbitrary code execution. The vulnerability exists in the file processing component and requires user interaction—specifically, a victim must open a malicious file. An authenticated attacker (or unauthenticated attacker via social engineering) can craft a malicious file that, when opened in a vulnerable version of Dreamweaver, executes arbitrary code in the context of the current user. No remote exploitation vector is present; the file must be opened locally. Adobe has issued a security advisory (APSB26-01) with patched versions.

## Affected products

- Adobe Dreamweaver 21.6 and earlier

## Timeline

- 2026-01-13: disclosed

## References

- [https://helpx.adobe.com/security/products/dreamweaver/apsb26-01.html](https://helpx.adobe.com/security/products/dreamweaver/apsb26-01.html)

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