CVE-2025-15336 is a vulnerability identified in Tanium Performance, a product used for endpoint management and performance monitoring. The issue arises from incorrect default permissions configured in versions 1.17.0, 1.21.0, and 1.22.0, which allow users with high privileges to access or modify sensitive data beyond their intended scope. The vulnerability does not require user interaction and can be exploited remotely, but it does require the attacker to have high-level privileges on the system, such as administrative or equivalent access. The CVSS 3.1 base score is 6.5, indicating a medium severity level, with a vector indicating network attack vector (AV:N), low attack complexity (AC:L), high privileges required (PR:H), no user interaction (UI:N), unchanged scope (S:U), and high impact on confidentiality and integrity (C:H/I:H) but no impact on availability (A:N). This means that while the vulnerability can be exploited remotely, the prerequisite of high privileges limits the attack surface primarily to insiders or compromised accounts with elevated rights. The incorrect default permissions could lead to unauthorized disclosure or modification of sensitive performance data, potentially undermining trust in system monitoring and management. No public exploits have been reported yet, but the presence of this vulnerability necessitates immediate attention from organizations using the affected versions. Tanium has addressed the issue, but no direct patch links are provided in the data, so organizations should consult official Tanium advisories for remediation steps.

For European organizations, this vulnerability poses a risk primarily to confidentiality and integrity of endpoint performance data managed by Tanium Performance. Unauthorized access or modification of this data could lead to inaccurate monitoring, misinformed operational decisions, or exposure of sensitive system information. Organizations in sectors with stringent data protection requirements, such as finance, healthcare, and critical infrastructure, could face compliance risks if sensitive data is exposed. The requirement for high privileges to exploit the vulnerability reduces the likelihood of external attackers exploiting it directly but increases the risk from insider threats or attackers who have already gained elevated access. Disruption to monitoring capabilities could indirectly affect operational efficiency and incident response. Given Tanium's use in large enterprises and government agencies, the vulnerability could be leveraged for lateral movement or persistence within networks if combined with other attack vectors. The absence of known exploits in the wild provides a window for proactive mitigation, but organizations should not delay patching or permission audits.

1. Immediately verify if your organization uses Tanium Performance versions 1.17.0, 1.21.0, or 1.22.0 and prioritize these systems for review. 2. Apply official patches or updates from Tanium as soon as they become available; monitor Tanium's security advisories closely. 3. Conduct a thorough audit of permission settings within Tanium Performance to ensure that default permissions have been corrected and adhere to the principle of least privilege. 4. Restrict administrative and high-privilege access to only trusted personnel and implement multi-factor authentication to reduce risk of privilege misuse. 5. Monitor logs and alerts for unusual access patterns or modifications to performance data that could indicate exploitation attempts. 6. Incorporate Tanium Performance into your organization's vulnerability management and incident response plans to ensure rapid detection and remediation of related threats. 7. Educate internal teams about the risks associated with elevated privileges and enforce strict access controls. 8. Consider network segmentation to limit the exposure of Tanium Performance servers to only necessary management networks.