CVE-2025-14417: 
PDF Architect vulnerability analysis and mitigation

CVE-2025-14417 is a remote code execution vulnerability in pdfforge PDF Architect caused by insufficient UI warning when handling the PDF Launch action. It was discovered by researcher "kimiya" and reported to the vendor on July 10, 2025. After the vendor failed to provide a patch, Zero Day Initiative (ZDI) published it as a 0-day advisory on December 11, 2025 (ZDI-25-1074), with the CVE formally published on December 23, 2025. The affected version is PDF Architect 9.1.74.23030. It carries a CVSS v3.0 base score of 7.8 (High) (ZDI Advisory).

The vulnerability is classified as CWE-356 (Product UI Does Not Warn User of Unsafe Actions) and resides in the implementation of the PDF Launch action within pdfforge PDF Architect. When a user opens a malicious PDF file or visits a malicious page, the application executes dangerous scripts or commands embedded via the Launch action without presenting any warning or confirmation dialog to the user. This allows an attacker to silently trigger arbitrary code execution in the context of the currently logged-in user. The attack vector is local (the malicious file must be opened by the target), requires no privileges, but does require user interaction (ZDI Advisory).

Successful exploitation grants an attacker full code execution in the context of the victim user, resulting in high confidentiality, integrity, and availability impact on the affected system. An attacker could read sensitive files, modify or delete data, install malware, or use the compromised endpoint as a pivot point for lateral movement within a network. Because no elevated privileges are required to trigger the vulnerability, any user who opens a crafted PDF is at risk (ZDI Advisory).

This vulnerability was published as a 0-day advisory by ZDI on December 11, 2025, meaning no vendor patch was available at the time of public disclosure. Exploitation requires social engineering — the target must open a malicious PDF file or visit a malicious page. The EPSS score is approximately 0.066% (low probability of near-term exploitation), and there is no evidence of in-the-wild exploitation or inclusion in the CISA KEV catalog as of the time of reporting. No public PoC exploit code has been identified beyond the ZDI advisory details (ZDI Advisory).

1. Craft malicious PDF: Create a PDF file containing a Launch action (using the /Launch PDF action type) that references a dangerous script or executable, exploiting the fact that PDF Architect does not warn the user before executing it.
2. Deliver the payload: Distribute the malicious PDF via phishing email, malicious website, or other social engineering means, enticing the target to open the file with PDF Architect.
3. Trigger execution: When the victim opens the PDF in PDF Architect, the Launch action is processed and the embedded script or command executes automatically without any user warning or confirmation prompt.
4. Achieve code execution: The attacker's payload runs in the context of the current user, enabling actions such as dropping additional malware, establishing persistence, exfiltrating data, or initiating lateral movement (ZDI Advisory).

• File System: Unexpected executables, scripts, or files created in user-writable directories (e.g., %TEMP%, %APPDATA%) shortly after opening a PDF file in PDF Architect.
• Process: Unusual child processes spawned by the PDF Architect process (e.g., cmd.exe, powershell.exe, wscript.exe, mshta.exe) with suspicious command-line arguments.
• Logs: Windows Event Logs (Security/Application) showing process creation events (Event ID 4688) with PDF Architect as the parent process and unexpected child processes.
• Network: Outbound network connections initiated by PDF Architect or its child processes to unknown external IP addresses or domains, potentially indicating C2 communication or payload download.

As of the 0-day advisory publication date (December 11, 2025), no vendor patch was available from pdfforge. ZDI's recommended mitigation is to restrict interaction with the product — specifically, avoid opening PDF files from untrusted sources in PDF Architect. Organizations should consider using an alternative PDF viewer with stricter Launch action controls (e.g., Adobe Acrobat, which prompts users before executing Launch actions) until a patch is released. Users should monitor pdfforge's official channels for a patched version and apply it promptly when available (ZDI Advisory).

The vulnerability was disclosed by ZDI as a 0-day after the vendor (pdfforge) did not provide a fix despite being notified in July 2025 and receiving multiple follow-up requests over several months. ZDI's disclosure timeline highlights a lack of vendor responsiveness, which is notable given the severity of the flaw. No significant public commentary from independent researchers or major media coverage has been identified beyond the ZDI advisory and automated vulnerability feed aggregators (ZDI Advisory).