CVE-2025-15320 is a vulnerability identified in the Tanium Client software, a widely used endpoint management and security platform. The issue arises from the client allowing multiple binds to the same network port, which can lead to a denial of service (DoS) condition. This improper handling of port binding can cause the Tanium Client service to become unresponsive or crash, thereby disrupting endpoint management operations. The affected versions include 7.4.10.0, 7.6.2.0, 7.6.4.0, and 7.7.3.0. The CVSS 3.1 base score is 3.3, indicating a low severity primarily because exploitation requires local access with low privileges (AV:L, PR:L), no user interaction (UI:N), and the impact is limited to availability (A:L) without affecting confidentiality or integrity. The vulnerability does not appear to be exploited in the wild yet. Tanium has addressed this issue, although no direct patch links are provided in the data. The vulnerability could be leveraged by an attacker with local access to disrupt endpoint management, potentially delaying incident response or security monitoring activities.

For European organizations, the primary impact of CVE-2025-15320 is on the availability of endpoint management services provided by the Tanium Client. Disruption of these services can hinder security operations, delay threat detection, and complicate incident response efforts. Organizations relying heavily on Tanium for real-time endpoint visibility and control, especially in critical infrastructure sectors such as finance, energy, and government, may experience operational challenges if the client service is rendered unavailable. Although the vulnerability does not compromise data confidentiality or integrity, the denial of service could create windows of opportunity for attackers to operate undetected. The requirement for local access limits the attack surface, but insider threats or attackers who have already gained foothold on endpoints could exploit this vulnerability to escalate disruption.

To mitigate CVE-2025-15320, European organizations should: 1) Apply vendor-provided patches or updates for the Tanium Client as soon as they become available to address the multiple bind issue. 2) Restrict local access to endpoints running the Tanium Client by enforcing strict access controls and using endpoint protection solutions to prevent unauthorized local logins. 3) Monitor endpoint service availability and implement alerting for Tanium Client service crashes or restarts to detect potential exploitation attempts. 4) Employ network segmentation and least privilege principles to limit the ability of attackers to gain local access. 5) Conduct regular security audits and endpoint integrity checks to identify signs of tampering or service disruption. 6) Coordinate with Tanium support for guidance on interim workarounds if patches are delayed.