CVE-2026-28255 in Tracer SC
Summary
by MITRE • 03/12/2026
A Use of Hard-coded Credentials vulnerability in Trane Tracer SC, Tracer SC+, and Tracer Concierge could allow an attacker to disclose sensitive information and take over accounts.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 03/27/2026
The vulnerability identified as CVE-2026-28255 represents a critical security flaw affecting Trane Tracer SC, Tracer SC+, and Tracer Concierge systems that utilize hard-coded credentials within their software implementations. This issue falls under the Common Weakness Enumeration category CWE-798, which specifically addresses the use of hard-coded credentials in software applications. The presence of hardcoded authentication parameters within these industrial control systems creates a fundamental security weakness that directly violates established security best practices and industry standards.
The technical implementation of this vulnerability stems from the inclusion of static username and password combinations within the source code or configuration files of the affected Trane systems. These hardcoded credentials are typically embedded during the development phase and remain unchanged throughout the system lifecycle, creating persistent access points that are not easily discoverable by system administrators. Attackers who gain knowledge of these hardcoded credentials can exploit them to establish unauthorized access to the industrial control systems, potentially compromising the entire facility's operational technology infrastructure. The vulnerability is particularly concerning because it affects multiple variants of Trane's control systems, suggesting a widespread implementation flaw across the product line.
From an operational standpoint, the impact of this vulnerability extends beyond simple unauthorized access to encompass potential system compromise and data exfiltration capabilities. An attacker exploiting this vulnerability could gain administrative privileges within the Trane systems, enabling them to modify operational parameters, access sensitive operational data, and potentially disrupt critical building automation functions. The consequences could include unauthorized control of heating, ventilation, and air conditioning systems, which may lead to safety hazards, energy waste, and disruption of critical building operations. This vulnerability particularly affects environments where these systems are deployed in critical infrastructure settings such as hospitals, data centers, and industrial facilities where continuous operation is essential.
The exploitation of this vulnerability aligns with tactics described in the MITRE ATT&CK framework under the T1078 technique for Valid Accounts, specifically focusing on the use of default or hardcoded credentials as a method of gaining initial access to target systems. Security professionals should consider implementing comprehensive credential management protocols, including regular credential rotation, privilege separation, and monitoring for unauthorized access attempts. Organizations operating these Trane systems must conduct immediate vulnerability assessments to identify any instances of hardcoded credentials within their installations and implement remediation measures such as credential updates, system patching, and network segmentation to prevent unauthorized access. The vulnerability also highlights the importance of secure software development practices and adherence to cybersecurity frameworks such as NIST SP 800-53, which emphasizes the need for secure authentication mechanisms and proper credential handling in industrial control systems.