CVE-2026-47906: Dreamweaver Desktop Vulnerable Component Execution – Patch Now

Technical summary

CVE-2026-47906 is a third-party component vulnerability affecting Dreamweaver Desktop up to version 21.7. The vulnerability has a CVSS v3.1 score of 8.6 (HIGH) with a vector of CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H, indicating local attack vector, low attack complexity, no privileges required, user interaction required, and changed scope with high impact to confidentiality, integrity, and availability. The flaw resides in a bundled or integrated third-party library rather than Dreamweaver's native code. Exploitation is triggered when a victim opens a specially crafted malicious file in the application, leading to arbitrary code execution within the user's security context and potentially affecting system-level resources due to the changed scope parameter.

Business impact

Organizations relying on Dreamweaver for web design and development workflows face direct risk of compromise through social engineering attacks. An attacker could distribute malicious project files via email, file-sharing platforms, or compromised websites, deceiving users into opening them. Once executed, the attacker gains code execution capabilities, potentially leading to theft of source code, intellectual property, customer data embedded in projects, or lateral movement into the broader network. This is particularly concerning for agencies and firms handling sensitive client information or proprietary designs. The changed scope means the vulnerability can breach security boundaries and affect other processes or systems beyond Dreamweaver itself.

Affected systems

Adobe Dreamweaver Desktop through version 21.7 running on Windows and macOS platforms is affected. The vulnerability is not limited to a single operating system; both Windows and macOS deployments of vulnerable Dreamweaver versions require patching. Organizations should inventory all instances of Dreamweaver in their environments and confirm version numbers, particularly in development teams, digital agencies, and design departments.

Exploitability

While the vulnerability requires user interaction (opening a malicious file), this does not make it difficult to exploit in practice. Social engineering is a mature attack technique; distributing a .dw file or related project format disguised as legitimate work—sent from a compromised peer, disguised as a client deliverable, or hosted on a seemingly trusted repository—can be highly effective. No special privileges are required to trigger the vulnerability; any user running Dreamweaver can be targeted. The attack complexity is low, meaning straightforward file distribution methods suffice. The vulnerability has not been observed in the wild as of publication (KEV status is false), but organizations should assume it will be leveraged once patches are widely available, making it a strong candidate for active monitoring and rapid remediation.

Remediation

Adobe users must upgrade Dreamweaver Desktop to a version later than 21.7. Verify the exact patched version number in Adobe's official security bulletin, as version numbering may skip incrementally. Until patches are applied, organizations should restrict file-opening permissions where feasible, disable automatic opening of Dreamweaver files from email attachments, and provide user awareness training on not opening unexpected project files from untrusted sources. Consider restricting Dreamweaver installation to essential personnel only and enforcing file-type filters at the email gateway to block suspicious Dreamweaver project files.

Patch guidance

Consult Adobe's official security advisory for the exact patched version number and release date. Deploy patches through Adobe's patch management tools or via manual update within Dreamweaver (Help > Updates or similar menu option). Prioritize patching development and design teams first, as they are highest-risk. Verify successful patching by checking the About Dreamweaver dialog or version number command-line tool to confirm the installed version exceeds 21.7. Test patched versions in a non-production environment first to ensure compatibility with existing workflows and third-party plugins.

Detection guidance

Monitor for unusual file access patterns involving Dreamweaver project files (.dw, .dwt, or related extensions) from external or suspicious sources. Log process execution chains initiated by Dreamweaver, looking for unexpected child processes, command-line tools, or network connections spawned after opening files. Endpoint Detection and Response (EDR) solutions can flag code execution anomalies following Dreamweaver file operations. Monitor for failed or successful execution of code within the Dreamweaver process space. Track file modification events in directories where Dreamweaver stores cached or temporary project data, as a successful exploit may leave forensic traces. Query for any instances of Dreamweaver versions 21.7 or earlier still running in the environment via vulnerability scanners or software inventory tools.

Why prioritize this

This vulnerability merits immediate prioritization due to its HIGH CVSS score (8.6), wide impact scope, changed security boundary, and reliance on a low-friction social engineering trigger (file-opening). Although not yet in the wild, the combination of high impact (arbitrary code execution with full user privileges) and ease of exploitation makes it a prime target for adversaries once public information is widely disseminated. The presence on both Windows and macOS increases organizational exposure. Given the design-focused nature of Dreamweaver users, they may be accustomed to opening files from collaborators and vendors, increasing social engineering success rates.

Risk score, explained

The CVSS 8.6 HIGH score reflects the vulnerability's capacity for complete system compromise (high impact across confidentiality, integrity, and availability) paired with low-barrier exploitation (user interaction via file-opening, no special privileges). The changed scope parameter elevates risk by allowing the attacker to escape the Dreamweaver process and affect the broader system. The local attack vector is offset by the practicality of social engineering, making real-world exploitation likely. The vulnerability does not yet have active exploitation in the wild (KEV status false), but the score assumes worst-case scenarios once disclosure is complete.

Frequently asked questions