CVE-2026-116665 in Discover
Summary
by MITRE • 11/04/2026
Tanium addressed an information disclosure vulnerability in Discover.
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Analysis
by VulDB Data Team • 11/04/2026
The security incident involving Tanium's Discover component represents a critical failure in access control mechanisms that resulted in the unauthorized exposure of sensitive system data. This vulnerability, classified under the broader category of improper privilege management and broken access controls, allowed unauthenticated or low-privileged users to retrieve information that was intended for administrative use only. In enterprise environments where Tanium is deployed as a central endpoint management platform, such disclosures can expose detailed inventory records, software configurations, network topology details, and potentially user-specific metadata associated with managed endpoints. The flaw likely stemmed from insufficient validation of client requests or the absence of strict role-based access control checks within the API endpoints exposed by the Discover service, enabling attackers to query internal databases directly without proper authentication tokens or permission verification.
From a technical perspective, this type of vulnerability typically involves RESTful APIs or web services that fail to enforce authorization policies at the server side before processing queries. When an attacker sends a crafted request to these endpoints, the system processes it and returns data containing sensitive identifiers such as hostnames, IP addresses, operating system versions, installed application lists, and potentially security patch status. This information is highly valuable for threat actors conducting reconnaissance phases of an attack lifecycle. By aggregating this data, adversaries can map out the internal network structure, identify high-value targets based on software vulnerabilities or outdated patches, and plan subsequent exploitation attempts with greater precision. The exposure does not necessarily involve direct code execution but serves as a significant enabler for further malicious activities by reducing the effort required to understand the target environment's security posture.
The operational impact of this information disclosure is substantial, particularly in organizations relying on Tanium for real-time visibility into their IT infrastructure. Compromised confidentiality can lead to regulatory non-compliance if personally identifiable information or protected health data was inadvertently exposed through endpoint details. Furthermore, the leakage of software inventory and patch levels allows attackers to prioritize exploits against known vulnerabilities that have not yet been remediated by the organization's maintenance cycles. This creates a window of opportunity for lateral movement within the network once an initial foothold is established elsewhere. The trust model inherent in Tanium deployments means that compromising its management interface can effectively compromise the security integrity of all connected endpoints, making this vulnerability a high-severity risk to overall organizational resilience and data governance frameworks.
To mitigate such risks, organizations must ensure they are running the latest patched versions of Tanium software as provided by the vendor, which typically include fixes for access control logic errors. Network segmentation strategies should be implemented to restrict access to management interfaces like Discover from untrusted networks or general user subnets, limiting exposure only to authorized administrative workstations and secure internal zones. Additionally, implementing strict firewall rules that whitelist specific source IP addresses for accessing these services adds a layer of defense-in-depth. Security teams should also monitor logs for unusual query patterns or high-volume data retrieval attempts against the Discover API, which may indicate automated scanning or exploitation activity. Regular audits of user roles and permissions within the Tanium console are essential to ensure that only necessary personnel have access to sensitive discovery functions, aligning with principles of least privilege advocated by industry standards such as NIST SP 800-53 and CIS Benchmarks for secure system configuration.