Adobe Dreamweaver Desktop up to 21.6 File input validation

Summaryinfo

A vulnerability, which was classified as critical, has been found in Adobe Dreamweaver Desktop up to 21.6. This affects an unknown part of the component File Handler. The manipulation leads to input validation. This vulnerability is traded as CVE-2026-21271. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Adobe Dreamweaver Desktop up to 21.6. This issue affects an unknown functionality of the component File Handler. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Dreamweaver Desktop versions 21.6 and earlier are affected by an Improper Input Validation vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file and scope is changed.

It is possible to read the advisory at helpx.adobe.com. The identification of this vulnerability is CVE-2026-21271 since 12/12/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/14/2026).

The vulnerability scanner Nessus provides a plugin with the ID 283674 (Adobe Dreamweaver 21.0 < 21.7 Multiple Vulnerabilities (APSB26-01) (macOS)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (283674). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Adobe

Name

• Dreamweaver Desktop

Version

• 21.0
• 21.1
• 21.2
• 21.3
• 21.4
• 21.5
• 21.6

License

• commercial

Website

• Vendor: https://www.adobe.com/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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