CVE-2025-9327 is a security vulnerability identified in Foxit PDF Reader version 2024.4.0.27683. The flaw is an out-of-bounds read (CWE-125) occurring during the parsing of PRC files, which are a type of embedded 3D content within PDFs. Specifically, the vulnerability arises because the software fails to properly validate user-supplied data when processing PRC file structures, leading to reading beyond the allocated buffer boundaries. This out-of-bounds read can cause information disclosure by leaking sensitive memory contents to an attacker. Exploitation requires user interaction, such as opening a maliciously crafted PDF file or visiting a malicious webpage that triggers the vulnerable parsing code. Although the immediate impact is limited to information disclosure, the vulnerability can be chained with other exploits to achieve arbitrary code execution within the context of the Foxit PDF Reader process. The CVSS v3.0 base score is 3.3, indicating a low severity primarily due to the requirement for user interaction and limited impact scope (confidentiality only). No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability was assigned and published by the Zero Day Initiative (ZDI) under the identifier ZDI-CAN-26774.

For European organizations, this vulnerability poses a moderate risk primarily to confidentiality of information. Since Foxit PDF Reader is widely used across enterprises and government agencies in Europe for handling PDF documents, an attacker could leverage this flaw to extract sensitive data from memory, potentially including fragments of documents or application data. The requirement for user interaction limits mass exploitation but targeted spear-phishing campaigns or malicious document distribution could be effective attack vectors. The possibility of chaining this vulnerability with others to achieve code execution raises concerns for advanced persistent threat (APT) actors targeting high-value European entities. Confidentiality breaches could lead to exposure of intellectual property, personal data protected under GDPR, or internal communications. However, the lack of impact on integrity or availability and the low CVSS score suggest the immediate threat level is limited. Organizations handling sensitive or regulated data should still consider this vulnerability significant due to the potential for information leakage and subsequent escalation.

European organizations should implement the following specific mitigations: 1) Update Foxit PDF Reader to the latest version as soon as a patch addressing CVE-2025-9327 is released by the vendor. 2) Employ application whitelisting and restrict the execution of untrusted or unknown PDF files, especially those containing embedded 3D content like PRC files. 3) Educate users about the risks of opening PDF attachments or links from untrusted sources to reduce the likelihood of successful exploitation via social engineering. 4) Utilize endpoint detection and response (EDR) tools to monitor for anomalous behavior associated with PDF reader processes, such as unexpected memory access patterns or network connections. 5) Consider disabling or restricting PRC file parsing features in Foxit PDF Reader if feasible, or use alternative PDF readers with a lower attack surface for handling sensitive documents. 6) Implement network-level protections such as sandboxing or email gateway scanning to detect and block malicious PDF files before reaching end users. These targeted measures go beyond generic advice by focusing on the specific attack vector and exploitation requirements of this vulnerability.