CVE-2025-64085 is a vulnerability identified in PDF-XChange Editor version 10.7.3.401, specifically within the importDataObject() function. The flaw is a NULL pointer dereference (CWE-476), which occurs when the software attempts to access or manipulate a pointer that has not been properly initialized or has been set to NULL. When a specially crafted input file is processed by this function, it triggers the dereference, causing the application to crash. This results in a Denial of Service (DoS) condition, where legitimate users are unable to use the PDF-XChange Editor until it is restarted. The CVSS v3.1 base score is 6.5, indicating a medium severity level. The vector string (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H) shows that the attack can be launched remotely over the network without privileges, but requires user interaction (opening the malicious file). The scope remains unchanged, and the impact is limited to availability, with no confidentiality or integrity compromise. No patches or exploit code are currently publicly available, and no known exploits have been observed in the wild. This vulnerability primarily affects environments where PDF-XChange Editor is used to open untrusted or externally sourced PDF files, potentially disrupting business operations through application crashes.

For European organizations, the primary impact of CVE-2025-64085 is operational disruption due to application crashes causing Denial of Service. Organizations relying on PDF-XChange Editor for document processing, especially in sectors such as finance, legal, and government, may face productivity losses and workflow interruptions. Although this vulnerability does not lead to data breaches or unauthorized data modification, the inability to access or process critical documents can delay decision-making and service delivery. In environments with automated document handling or where PDF files are frequently exchanged with external partners, the risk of encountering maliciously crafted files is higher. Additionally, repeated crashes could lead to increased support costs and potential reputational damage if service availability is critical. The lack of known exploits reduces immediate risk, but the medium severity score and ease of triggering via user interaction warrant proactive mitigation.

1. Monitor for vendor updates and apply patches promptly once released for PDF-XChange Editor to address this vulnerability. 2. Implement strict file validation and filtering policies to block or quarantine suspicious PDF files from untrusted sources before they reach end users. 3. Educate users to avoid opening PDF files from unknown or untrusted senders, emphasizing the risk of application crashes and potential DoS. 4. Deploy endpoint protection solutions capable of detecting anomalous application crashes or behavior related to PDF-XChange Editor. 5. Consider sandboxing PDF-XChange Editor or opening PDFs in isolated environments to contain potential crashes and prevent broader impact. 6. Maintain regular backups and ensure business continuity plans account for temporary loss of PDF processing capabilities. 7. Use alternative PDF viewers with a strong security track record for handling high-risk documents until the vulnerability is patched.