CVE-2025-9327 is a security vulnerability identified in Foxit PDF Reader version 2024.4.0.27683, specifically involving an out-of-bounds read flaw in the parsing of PRC files. PRC files are a format used within PDFs to embed 3D content or other complex data structures. The vulnerability arises due to improper validation of user-supplied data during PRC file parsing, which allows an attacker to read memory beyond the allocated buffer boundaries. This out-of-bounds read can lead to information disclosure, potentially exposing sensitive data from the process memory. Exploitation requires user interaction, such as opening a maliciously crafted PDF file or visiting a web page hosting such a file. Although the vulnerability itself primarily leads to information disclosure, it can be chained with other vulnerabilities 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 because the attack vector is local (requires user interaction), no privileges are required, and the impact is limited to confidentiality with no direct impact on integrity or availability. No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability was reserved and published in late August and early September 2025, respectively, and is tracked under CWE-125 (Out-of-bounds Read).

For European organizations, the primary impact of CVE-2025-9327 is the potential leakage of sensitive information from systems running the affected Foxit PDF Reader version. Since Foxit PDF Reader is widely used across various sectors including government, finance, education, and healthcare, any information disclosure could expose confidential documents or internal data, leading to privacy violations or aiding further targeted attacks. The requirement for user interaction (opening a malicious file) limits the risk somewhat, but phishing campaigns or malicious document distribution remain viable attack vectors. The possibility of chaining this vulnerability with others to achieve code execution increases the threat level in complex attack scenarios. Organizations handling sensitive or regulated data (e.g., GDPR-protected personal data) could face compliance and reputational risks if such information is leaked. However, the low CVSS score and lack of known exploits suggest the immediate risk is moderate, though vigilance is warranted given the potential for escalation.

European organizations should implement specific mitigations beyond generic advice: 1) Update Foxit PDF Reader to the latest version as soon as a patch addressing CVE-2025-9327 is released. 2) Employ application whitelisting and restrict the execution of PDF readers to trusted users and environments. 3) Educate users to avoid opening PDF files from untrusted or unsolicited sources, especially those containing embedded 3D content or unusual attachments. 4) Use advanced endpoint protection solutions capable of detecting anomalous behavior related to PDF parsing or memory access violations. 5) Implement network-level controls to block or quarantine suspicious email attachments or downloads containing PDFs with embedded PRC files. 6) Monitor logs and alerts for unusual activity related to Foxit PDF Reader processes. 7) Consider sandboxing PDF readers or opening PDFs in isolated environments to limit the impact of potential exploitation. These measures collectively reduce the likelihood of successful exploitation and limit damage if an attack occurs.