CVE-2026-116666 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 disclosed vulnerability represents a critical flaw within the Tanium Discover component, specifically categorized as an information disclosure issue that allows unauthorized parties to access sensitive data without proper authentication or authorization controls. In enterprise environments where Tanium is deployed for endpoint management and security orchestration, the Discover module serves as a central interface for aggregating system inventory, configuration states, and real-time telemetry from managed endpoints. When this component fails to enforce strict access control policies on specific API endpoints or internal data retrieval functions, it creates an avenue for attackers to extract confidential organizational intelligence. This type of vulnerability is fundamentally rooted in broken access control mechanisms, aligning with CWE-284 (Improper Access Control) and often involving insecure direct object references if the flaw allows traversal across different tenant boundaries or user roles within the platform.
From a technical perspective, the exploitation of this information disclosure vulnerability typically involves crafting specific HTTP requests to endpoints that are intended for administrative use but lack sufficient validation checks on the requesting entity's privileges. An attacker with network access to the Tanium infrastructure could potentially query these exposed interfaces to retrieve detailed lists of installed software, hardware specifications, user accounts, and security configurations across thousands of devices simultaneously. This aggregation of data provides a comprehensive map of the organization’s attack surface, revealing potential entry points such as outdated applications or misconfigured services that would otherwise remain hidden from external threat actors. The severity of this flaw is amplified by its ability to facilitate further reconnaissance activities without triggering typical intrusion detection alerts associated with brute-force attacks or exploit attempts against known software vulnerabilities.
The operational impact of successfully exploiting this vulnerability extends beyond simple data leakage, as it serves as a force multiplier for subsequent attack phases within the MITRE ATT&CK framework. Specifically, the activity maps directly to T1087 (Account Discovery) and T1201 (Password Policy Discovery), allowing adversaries to understand identity structures and security policies before launching targeted credential-based attacks or privilege escalation attempts. Furthermore, by obtaining detailed inventory data, attackers can identify high-value targets such as domain controllers, database servers, or systems running critical business applications with known unpatched vulnerabilities. This contextual intelligence enables more precise and effective lateral movement strategies, significantly increasing the likelihood of a successful breach that could lead to ransomware deployment, intellectual property theft, or complete system compromise.
Mitigation for this vulnerability requires immediate application of vendor-provided patches or updates released by Tanium to address the access control deficiencies in the Discover component. Organizations should also implement network segmentation strategies to restrict direct internet-facing exposure of management consoles and API endpoints, ensuring they are only accessible from trusted internal subnets via secure protocols like HTTPS with mutual TLS authentication where applicable. Additionally, security teams should audit their existing configurations for any exposed administrative interfaces that do not require multi-factor authentication or role-based access control enforcement. Continuous monitoring through SIEM solutions configured to detect anomalous data retrieval patterns, such as unusually large volumes of inventory queries from single source IPs, can provide early warning indicators of exploitation attempts while patching efforts are underway.