CVE-2025-62552 is a relative path traversal vulnerability classified under CWE-23, affecting Microsoft Office Access within Microsoft 365 Apps for Enterprise version 16.0.1. Relative path traversal vulnerabilities occur when an application improperly sanitizes user-supplied file path input, allowing attackers to manipulate file paths to access unintended directories or files. In this case, the vulnerability enables an unauthorized attacker to execute arbitrary code locally by crafting malicious input that causes the application to load or execute files from unintended locations. The vulnerability does not require prior privileges (PR:N) but does require user interaction (UI:R), such as opening a malicious file or document. The attack vector is local (AV:L), meaning the attacker must have local access to the system. The vulnerability impacts confidentiality, integrity, and availability (C:H/I:H/A:H), indicating that successful exploitation can lead to full system compromise, including data theft, modification, or denial of service. The CVSS vector also indicates the scope is unchanged (S:U), meaning the impact is confined to the vulnerable component. No known exploits have been reported in the wild yet, but the vulnerability is publicly disclosed and assigned a high severity score of 7.8. Microsoft has not yet released a patch, so mitigation currently relies on limiting exposure and applying best practices. Given the widespread deployment of Microsoft 365 Apps for Enterprise in corporate environments, this vulnerability represents a significant risk if exploited.

The potential impact of CVE-2025-62552 is substantial for organizations worldwide. Successful exploitation allows attackers to execute arbitrary code locally, which can lead to full system compromise. This includes unauthorized access to sensitive data, installation of persistent malware, privilege escalation, and disruption of business operations. Since Microsoft 365 Apps for Enterprise is widely used in enterprises, government agencies, and critical infrastructure, the vulnerability could be leveraged to target high-value assets and intellectual property. The requirement for local access and user interaction somewhat limits remote exploitation but does not eliminate risk, especially in environments where users frequently open documents from untrusted sources or where insider threats exist. The vulnerability could also be chained with other exploits to achieve remote code execution or lateral movement within networks. The absence of a patch increases the urgency for organizations to implement compensating controls to reduce attack surface and monitor for suspicious activity.

1. Apply patches promptly once Microsoft releases an official fix for CVE-2025-62552. Monitor Microsoft security advisories closely. 2. Until a patch is available, restrict local user permissions to the minimum necessary to reduce the risk of exploitation. 3. Implement application whitelisting to prevent unauthorized code execution. 4. Educate users to avoid opening documents or files from untrusted or unknown sources, minimizing the chance of triggering the vulnerability. 5. Employ endpoint detection and response (EDR) solutions to monitor for anomalous behavior indicative of exploitation attempts, such as unexpected file access or code execution. 6. Use file integrity monitoring to detect unauthorized changes to critical files or directories. 7. Enforce strict network segmentation to limit lateral movement if local compromise occurs. 8. Regularly audit and harden Microsoft 365 configurations and access controls to reduce attack surface. 9. Consider disabling or restricting Microsoft Access usage in environments where it is not essential.