CVE-2025-15343 is a vulnerability identified in Tanium Enforce, a security and compliance management product widely used for endpoint configuration enforcement. The issue arises from incorrect default permissions assigned within the product in versions 2.7.0, 2.8.0, and 2.9.0. Specifically, the default permission settings allow users with high privileges (PR:H) to access sensitive data and modify configurations beyond their intended scope, leading to a compromise of confidentiality and integrity. The vulnerability has a CVSS 3.1 base score of 6.5, indicating a medium severity level. The attack vector is network-based (AV:N), requiring the attacker to have high privileges but no user interaction (UI:N). The scope is unchanged (S:U), meaning the impact is confined to the vulnerable component. Although no exploits have been reported in the wild, the incorrect permissions could be leveraged by insiders or attackers who have already gained elevated privileges to escalate their access or manipulate endpoint security policies. Tanium Enforce is critical in managing endpoint compliance and security posture, so unauthorized changes could lead to policy bypass, data leakage, or weakened endpoint defenses. The vulnerability was reserved at the end of 2025 and published in early 2026, with no patch links provided in the data, indicating that organizations should verify the availability of updates or apply configuration changes to mitigate risk.

For European organizations, the vulnerability could lead to unauthorized disclosure of sensitive configuration data and unauthorized modification of endpoint security policies, undermining the integrity of security controls. This is particularly concerning for sectors with stringent compliance requirements such as finance, healthcare, and critical infrastructure. Attackers or malicious insiders with high privileges could exploit this flaw to weaken endpoint defenses, potentially facilitating further lateral movement or data exfiltration. The lack of known exploits reduces immediate risk, but the medium severity and network accessibility mean that organizations should act proactively. Disruption of endpoint security management could also impact incident response and compliance reporting, increasing regulatory and operational risks within the European Union and other European countries with strict data protection laws.

Organizations should immediately audit Tanium Enforce deployments to identify affected versions (2.7.0, 2.8.0, 2.9.0) and verify default permission settings. Restrict high privilege accounts to only trusted personnel and enforce the principle of least privilege. Monitor logs and access patterns for unusual activities related to configuration changes or data access within Tanium Enforce. If patches or updates are available from Tanium, apply them promptly. In the absence of patches, manually adjust permissions to tighten access controls and disable or limit network access to the management interfaces of Tanium Enforce. Additionally, implement network segmentation to isolate management consoles and use multi-factor authentication for privileged accounts to reduce the risk of credential compromise. Regularly review endpoint security policies to detect unauthorized modifications.