CVE-2025-7307 in CADImage Plugin
Summary
by MITRE • 07/21/2025
IrfanView CADImage Plugin DWG File Parsing Memory Corruption Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of IrfanView CADImage Plugin. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the parsing of DWG files. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-26388.
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Analysis
by VulDB Data Team • 06/06/2026
The vulnerability in question represents a critical memory corruption flaw within the IrfanView CADImage Plugin that processes DWG files, creating a remote code execution vector that can be exploited by malicious actors. This vulnerability falls under the category of memory safety issues and specifically manifests as a buffer overflow or heap corruption condition that occurs during the parsing of maliciously crafted DWG files. The flaw exists in the plugin's handling of user-supplied data without adequate validation mechanisms, allowing attackers to manipulate the parsing process and potentially overwrite critical memory regions. The vulnerability was identified as ZDI-CAN-26388 and demonstrates how third-party plugins can introduce significant security risks to otherwise stable software platforms.
The technical implementation of this vulnerability stems from insufficient input validation within the CADImage Plugin's DWG file parser. When processing DWG files, the plugin fails to properly validate the structure and content of incoming data, creating opportunities for attackers to craft malicious files that trigger memory corruption conditions. The parsing logic does not adequately check array bounds, string lengths, or structural integrity of the DWG format, allowing crafted data to overwrite adjacent memory locations. This memory corruption can lead to arbitrary code execution in the context of the current process, potentially escalating privileges and compromising the entire system. The vulnerability operates at the intersection of software security and file format parsing, where improper validation of structured data can result in catastrophic memory safety issues. This type of flaw aligns with CWE-121, which describes heap-based buffer overflow conditions, and CWE-125, which covers out-of-bounds read vulnerabilities that can lead to memory corruption.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass complete system compromise and potential data exfiltration capabilities. An attacker requiring only user interaction through visiting a malicious webpage or opening a specially crafted DWG file can gain unauthorized access to the target system. The vulnerability's remote exploitation capability means that attackers can target users without requiring physical access or direct system compromise. The context of execution allows for privilege escalation depending on the user's permissions and the system's security configuration. This vulnerability affects not just individual users but entire organizations that rely on IrfanView for image processing tasks, as attackers can leverage the flaw to establish persistent access points or deploy additional malicious payloads. The attack surface is particularly concerning given that DWG files are commonly used in engineering and architectural environments where users frequently exchange files with external parties.
Mitigation strategies for this vulnerability should focus on immediate patching of the affected IrfanView CADImage Plugin and implementation of additional security controls. The primary recommendation involves applying vendor-provided security updates that address the memory corruption issue through proper input validation and bounds checking mechanisms. Organizations should implement network-based security controls such as web application firewalls and content filtering to prevent access to malicious DWG files. Additionally, user education regarding the risks of opening untrusted files and the importance of verifying file sources should be emphasized. The vulnerability demonstrates the importance of secure coding practices and input validation, particularly when handling complex file formats. Security teams should consider implementing sandboxing mechanisms for file processing and monitoring for unusual file access patterns that might indicate exploitation attempts. This vulnerability also highlights the need for regular security assessments of third-party plugins and components that extend the functionality of core applications, as these extensions often represent significant attack vectors due to their reduced security oversight compared to main application code. The remediation process should include comprehensive testing to ensure that patches do not introduce regressions in legitimate functionality while effectively addressing the memory corruption conditions that enable remote code execution.