CVE-2025-1273 is a heap-based buffer overflow vulnerability identified in Autodesk Revit versions 2023, 2024, and 2025. The vulnerability arises when a maliciously crafted PDF file is linked or imported into the Revit application. Specifically, the vulnerability is triggered during the processing of the PDF content, which leads to a heap-based buffer overflow (CWE-122). This type of overflow occurs when the application writes more data to a heap-allocated buffer than it can hold, corrupting adjacent memory. Exploiting this vulnerability can cause the application to crash, potentially leading to denial of service. More critically, an attacker can leverage this flaw to read sensitive data from memory or execute arbitrary code within the context of the current process. This means that if successfully exploited, the attacker could gain control over the Revit process, potentially allowing them to execute malicious payloads, escalate privileges, or move laterally within a compromised environment. The vulnerability does not require user authentication but does require the user to import or link a malicious PDF file into the application, implying some level of user interaction. As of the publication date, no known exploits have been observed in the wild, and no patches have been released yet. However, the vulnerability has been reserved and enriched by CISA, indicating recognition of its potential impact. Autodesk Revit is widely used in architecture, engineering, and construction (AEC) industries for building information modeling (BIM), making this vulnerability particularly relevant to organizations involved in these sectors.

For European organizations, especially those in the AEC sector, this vulnerability poses significant risks. Exploitation could lead to unauthorized disclosure of sensitive architectural and engineering data, which may include proprietary designs, client information, and project details. This could result in intellectual property theft or competitive disadvantage. Additionally, arbitrary code execution could allow attackers to establish persistence within corporate networks, potentially leading to broader compromises or ransomware attacks. The disruption caused by application crashes could delay critical project timelines, impacting business operations and contractual obligations. Given the strategic importance of infrastructure and construction projects in Europe, successful exploitation could have cascading effects on national infrastructure development and security. Organizations handling sensitive government or critical infrastructure projects using Autodesk Revit are particularly at risk. The medium severity rating suggests a moderate likelihood of exploitation but with potentially high impact if exploited.

1. Immediate mitigation should focus on user awareness and restricting the import or linking of PDF files from untrusted or unknown sources within Autodesk Revit projects. 2. Implement strict file validation and scanning policies for all PDFs before they are introduced into the Revit environment, using advanced malware detection tools capable of analyzing PDF content. 3. Employ application whitelisting and sandboxing techniques to limit the execution context of Revit and reduce the impact of potential code execution. 4. Monitor Revit application logs and system behavior for unusual crashes or memory access violations that could indicate exploitation attempts. 5. Coordinate with Autodesk for timely patch releases and apply updates as soon as they become available. 6. For organizations with high-value or sensitive projects, consider isolating Revit workstations from critical network segments and enforcing least privilege principles to limit lateral movement in case of compromise. 7. Conduct regular security training for users emphasizing the risks of importing files from unverified sources and the importance of following secure handling procedures for project files.