CVE-2026-21272 in Dreamweaver Desktop
Summary
by MITRE • 01/13/2026
Dreamweaver Desktop versions 21.6 and earlier are affected by an Improper Input Validation vulnerability that could lead to arbitrary file system write. An attacker could leverage this vulnerability to manipulate or inject malicious data into files on the system. Exploitation of this issue requires user interaction in that a victim must open a malicious file and scope is changed.
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Analysis
by VulDB Data Team • 01/14/2026
The vulnerability identified as CVE-2026-21272 represents a critical improper input validation flaw within Adobe Dreamweaver Desktop versions 21.6 and earlier. This weakness resides in the application's handling of file input processes, where insufficient validation mechanisms fail to properly sanitize or verify the integrity of data being processed. The vulnerability specifically affects the desktop version of Dreamweaver, which is widely used by web developers and designers for creating and managing web content, making it a significant concern for organizations relying on this development tool.
The technical exploitation of this vulnerability occurs through a targeted attack vector that requires user interaction to succeed. An attacker must craft a malicious file that, when opened by an unsuspecting user, triggers the flawed input validation process. This allows the attacker to manipulate the file system write operations, potentially injecting malicious data into critical system files or application components. The vulnerability's scope is limited by the requirement for user interaction, meaning the attack cannot occur automatically without user engagement, but this does not diminish its potential impact on individual users or organizations.
From an operational standpoint, this vulnerability creates substantial risk for organizations that depend on Dreamweaver for web development activities. The ability to perform arbitrary file system writes opens pathways for attackers to modify application configuration files, inject backdoors, or corrupt essential development resources. The requirement for user interaction means that successful exploitation typically involves social engineering tactics such as phishing campaigns or malicious file sharing, where users are tricked into opening seemingly legitimate files that contain the malicious payload. This makes the vulnerability particularly dangerous in environments where users may not be adequately trained in recognizing suspicious file attachments or downloads.
The security implications extend beyond simple file manipulation, as this vulnerability could potentially lead to privilege escalation or persistent access within the compromised system. Attackers might leverage this weakness to establish footholds within development environments, potentially compromising entire web applications or development workflows. The vulnerability's classification aligns with CWE-20, which addresses Improper Input Validation, and could be mapped to ATT&CK techniques such as T1059 for command and scripting interpreter usage or T1078 for valid accounts, depending on how the exploitation is extended. Organizations should prioritize immediate remediation through the latest Dreamweaver updates, implement strict file validation policies, and conduct user awareness training to prevent successful exploitation attempts.
The attack surface for this vulnerability is particularly concerning given Dreamweaver's role in web development environments where users frequently handle files from external sources. The requirement for user interaction does not eliminate the threat, as modern social engineering techniques can effectively bypass user awareness, making this vulnerability particularly dangerous in corporate environments where multiple developers may be working with files from various sources. Security teams should monitor for indicators of compromise related to file system modifications and implement network-based detection measures to identify potential exploitation attempts. The vulnerability demonstrates the importance of input validation in desktop applications and highlights the need for comprehensive security testing of development tools that handle user-provided content.