CVE-2026-50350 in Windows
Summary
by MITRE • 07/14/2026
Exposure of sensitive information to an unauthorized actor in Windows Trusted Runtime Interface Driver allows an authorized attacker to disclose information locally.
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Analysis
by VulDB Data Team • 07/14/2026
The vulnerability described represents a critical information disclosure flaw within the Windows Trusted Runtime Interface Driver component that enables local privilege escalation and data exfiltration. This issue falls under the category of insufficient authorization controls as defined by CWE-284, where proper access restrictions fail to prevent unauthorized information exposure. The Windows Trusted Runtime Interface Driver operates at a privileged kernel level, handling sensitive system operations and maintaining confidential data structures that should remain protected from unauthorized access. When an authorized attacker exploits this vulnerability, they can leverage their existing privileges to bypass normal security boundaries and extract sensitive information from memory regions that typically require higher privileges to access.
The technical implementation of this flaw likely involves improper validation of access controls within the driver's interface mechanisms. The Trusted Runtime Interface Driver maintains a set of internal data structures containing system credentials, cryptographic keys, or other sensitive operational parameters that should only be accessible to specific trusted processes or system components. The vulnerability manifests when the driver fails to properly enforce access control checks during information retrieval operations, allowing local user-mode processes to query memory locations or interface endpoints that contain confidential data. This represents a classic case of privilege escalation through information disclosure as outlined in the ATT&CK framework under technique T1068, where adversaries exploit system weaknesses to gain elevated privileges and access protected resources.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can enable attackers to extract critical system data that may facilitate further exploitation. An attacker with local access could potentially retrieve system credentials, encryption keys, or other sensitive information that would otherwise remain protected within the driver's secure memory space. This information exposure creates opportunities for lateral movement within the network, credential theft, and establishment of persistent access points. The vulnerability's local nature means that attackers do not require remote network access to exploit it, making it particularly dangerous in environments where local user accounts may be compromised through social engineering or other attack vectors.
Mitigation strategies should focus on implementing proper access control enforcement within the driver interface and applying timely security patches from Microsoft. System administrators should ensure that all Windows systems receive regular updates, particularly those addressing kernel-level vulnerabilities. The principle of least privilege should be enforced by limiting the number of processes that can interact with the Trusted Runtime Interface Driver, while also implementing monitoring for unusual access patterns to sensitive system interfaces. Additionally, organizations should conduct regular security assessments to identify potential unauthorized access points and ensure that proper segmentation controls prevent lateral movement even if one system is compromised. The vulnerability demonstrates the importance of maintaining robust kernel-level security boundaries as specified in security standards such as those outlined in the Common Criteria and NIST SP 800-53 frameworks, which emphasize the need for strict access control mechanisms at all system levels.