CVE-2022-37352 in PDF-XChange Editor
Summary
by MITRE • 03/29/2023
This vulnerability allows remote attackers to disclose sensitive information on affected installations of PDF-XChange Editor. 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 WMF files. Crafted data in a WMF file can trigger a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process. Was ZDI-CAN-17638.
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Analysis
by VulDB Data Team • 06/18/2026
CVE-2022-37352 represents a critical information disclosure vulnerability affecting PDF-XChange Editor software, specifically within its handling of Windows Metafile (WMF) format files. This vulnerability resides in the parsing mechanism that processes WMF graphics files, which are commonly embedded in various document formats including PDFs. The flaw manifests as a buffer over-read condition that occurs when the application attempts to parse malformed WMF data structures, allowing attackers to read memory locations beyond the intended buffer boundaries. This type of vulnerability is classified under CWE-125 as an "Out-of-bounds Read" and falls within the broader category of memory safety issues that can lead to information disclosure and potentially more severe exploitation vectors.
The exploitation of this vulnerability requires user interaction through either visiting a malicious webpage that loads a crafted WMF file or opening a malicious document containing such file. This makes the attack surface particularly concerning for enterprise environments where users frequently encounter documents from untrusted sources. The buffer over-read condition creates opportunities for attackers to extract sensitive data from the application's memory space, potentially including cryptographic keys, user credentials, or other confidential information. According to ATT&CK framework, this vulnerability maps to T1059.007 for Command and Scripting Interpreter and T1566 for Phishing, as it leverages social engineering techniques to deliver malicious content through seemingly legitimate document interactions.
From an operational impact perspective, this vulnerability poses significant risks to organizations relying on PDF-XChange Editor for document processing and viewing. The ability to execute arbitrary code in the context of the current process represents a severe escalation path that could allow attackers to gain full control over affected systems. The vulnerability's classification as a remote code execution vector through a simple document interaction means that a single compromised file could potentially compromise entire networks. Organizations using this software face potential data breaches, system compromises, and regulatory compliance violations, particularly in sectors handling sensitive information such as healthcare, finance, or government entities. The vulnerability's exploitation requires minimal user interaction, making it particularly dangerous in targeted attacks where social engineering can be combined with this technical weakness.
Effective mitigation strategies for CVE-2022-37352 should include immediate patch deployment from the vendor, as well as network-level defenses to block malicious WMF file downloads and execution. Security teams should implement application whitelisting policies that restrict the execution of untrusted documents and files, while also monitoring for unusual file access patterns that might indicate exploitation attempts. Organizations should conduct thorough vulnerability assessments to identify all systems running affected versions of PDF-XChange Editor and ensure that proper network segmentation is in place to limit the potential impact of successful exploitation. Additionally, user education programs should emphasize the dangers of opening suspicious documents and the importance of verifying document sources before interaction. The vulnerability highlights the critical importance of maintaining up-to-date software and implementing defense-in-depth strategies that combine multiple security controls to protect against sophisticated attack vectors.