CVE-2025-15318 is a vulnerability identified in Tanium's End-User Notifications Endpoint Tools, specifically within the Endpoint Configuration Toolset Solution. The flaw arises from improper link resolution before file access, commonly referred to as 'link following.' This means that when the software attempts to access or delete a file, it does not correctly validate symbolic links or shortcuts, allowing an attacker with local access and low privileges to manipulate the link to point to arbitrary files. Consequently, the attacker can cause the deletion of files that should not be accessible, leading to integrity compromise. The vulnerability affects versions 1.18.0, 10.0.0, and 10.1.0 of the product. The CVSS 3.1 base score is 5.1 (medium severity), with vector AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N, indicating local attack vector, low attack complexity, low privileges required, no user interaction, unchanged scope, no confidentiality impact, high integrity impact, and no availability impact. No public exploits have been reported yet, but the vulnerability could be leveraged by insiders or attackers with local system access to disrupt endpoint configurations or delete critical files. Tanium has addressed this issue in patches, though no direct patch links are provided in the data. The vulnerability is significant because Tanium tools are widely used in enterprise endpoint management and security operations, meaning exploitation could disrupt endpoint monitoring or management processes.

For European organizations, the impact of CVE-2025-15318 primarily concerns the integrity of endpoint management systems. Successful exploitation could allow an attacker with local access to delete critical configuration or operational files within Tanium's endpoint tools, potentially disrupting endpoint notification and management workflows. This could lead to incomplete endpoint visibility, delayed incident response, or misconfiguration of security policies. While confidentiality and availability are not directly affected, the integrity compromise could indirectly increase risk exposure by impairing security operations. Organizations in sectors with stringent endpoint security requirements—such as finance, healthcare, energy, and government—may face operational disruptions or compliance issues if endpoint management tools are compromised. The lack of known exploits reduces immediate risk, but the medium severity score and the critical role of Tanium tools in enterprise environments warrant prompt mitigation.

1. Apply official patches from Tanium as soon as they become available to address CVE-2025-15318. Monitor Tanium's security advisories for updates. 2. Restrict local access to systems running the affected Tanium endpoint tools, ensuring only trusted administrators have low privilege access. 3. Implement strict file system permissions and monitoring to detect unauthorized symbolic link creation or file deletions related to Tanium directories. 4. Use endpoint detection and response (EDR) solutions to monitor for suspicious local activities that could indicate exploitation attempts. 5. Conduct regular audits of endpoint tool configurations and file integrity checks to quickly identify anomalies. 6. Educate IT staff about the risks of local privilege misuse and enforce least privilege principles to minimize attack surface. 7. Consider network segmentation to isolate critical endpoint management infrastructure from less trusted environments.