# CVE-2026-21272: Adobe Dreamweaver improper input validation in file handling

Source: https://junglewise.ai/threats/cve-2026-21272-adobe-dreamweaver-improper-input-validation-in-file-handling  
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-2026-21272 · Severity: high · CVSS 8.6 · Published 2026-01-13

Adobe Dreamweaver is a professional web design and development tool used by designers and developers to build websites. Versions 21.6 and earlier contain a flaw that allows attackers to write arbitrary files to a victim's system if they open a malicious file, potentially leading to system compromise, data loss, or installation of malicious code.

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-2026-21272 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-21272 being exploited in the wild.

**How severe is CVE-2026-21272?** 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-2026-21272?** 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-2026-21272 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-21272?** 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

The vulnerability is an improper input validation flaw in Dreamweaver's file handling mechanism that allows arbitrary file system write operations. An attacker can craft a malicious file that, when opened by a user in Dreamweaver, bypasses input validation controls and writes arbitrary data to the filesystem. This requires user interaction (opening the malicious file) and the scope is changed, meaning the vulnerability impacts resources beyond the vulnerable component. The attack vector is local/user-initiated through file opening.

## Affected products

- Adobe Dreamweaver 21.6 and earlier

## Timeline

- 2026-01-13: disclosed
- other: Affects versions 21.6 and earlier; patched version not specified in advisory

## 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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