CVE-2026-21267
📋 TL;DR
This CVE describes an OS command injection vulnerability in Adobe Dreamweaver Desktop versions 21.6 and earlier. Attackers can execute arbitrary code by tricking users into opening malicious files. This affects all users running vulnerable versions of Dreamweaver.
💻 Affected Systems
- Adobe Dreamweaver Desktop
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining the same privileges as the user running Dreamweaver, potentially leading to data theft, ransomware deployment, or lateral movement.
Likely Case
Local privilege escalation or malware execution within the user context, potentially stealing sensitive project files or credentials.
If Mitigated
No impact if users don't open untrusted files and proper endpoint security controls are in place.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 21.7 or later
Vendor Advisory: https://helpx.adobe.com/security/products/dreamweaver/apsb26-01.html
Restart Required: Yes
Instructions:
1. Open Adobe Creative Cloud application. 2. Navigate to 'Apps' section. 3. Find Dreamweaver and click 'Update'. 4. Wait for update to complete. 5. Restart Dreamweaver.
🔧 Temporary Workarounds
Restrict file opening
allConfigure Dreamweaver to only open trusted files from known sources
Run with reduced privileges
windowsRun Dreamweaver with limited user account privileges to reduce impact
🧯 If You Can't Patch
- Disable Dreamweaver until patched and use alternative web development tools
- Implement application whitelisting to prevent Dreamweaver execution
🔍 How to Verify
Check if Vulnerable:
Check Dreamweaver version via Help > About Dreamweaver. If version is 21.6 or earlier, system is vulnerable.Check Version:
On Windows: Check via Creative Cloud app or Help > About. On macOS: Dreamweaver > About DreamweaverVerify Fix Applied:
Verify Dreamweaver version is 21.7 or later via Help > About Dreamweaver.📡 Detection & Monitoring
Log Indicators:
- Unexpected process execution from Dreamweaver
- Suspicious command-line arguments in Dreamweaver processes
Network Indicators:
- Unexpected outbound connections from Dreamweaver process
SIEM Query:
process_name:"dreamweaver.exe" AND (process_command_line:*cmd* OR process_command_line:*powershell* OR process_command_line:*bash*)