CVE-2026-28256 in Tracer SC
Summary
by MITRE • 03/12/2026
A Use of Hard-coded, Security-relevant Constants vulnerability in Trane Tracer SC, Tracer SC+, and Tracer Concierge could allow an attacker to disclose sensitive information and take over accounts.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 03/27/2026
The vulnerability identified as CVE-2026-28256 represents a critical security flaw affecting Trane Tracer SC, Tracer SC+, and Tracer Concierge systems that operates through the misuse of hard-coded security constants. This type of vulnerability falls under the CWE-547 category, specifically addressing the use of hard-coded passwords, keys, or other security-relevant constants within software applications. The affected Trane systems are designed for building automation and energy management, making them critical infrastructure components in commercial and industrial environments where security breaches could have significant operational and financial consequences.
The technical implementation of this vulnerability stems from the inclusion of hardcoded authentication credentials, encryption keys, or other security-relevant parameters within the firmware or software components of these Trane devices. These hard-coded elements are typically embedded during the development phase and remain static throughout the device's operational lifecycle, creating persistent security risks. Attackers can exploit this weakness by reverse engineering the device firmware or through network analysis to extract these hardcoded credentials, which often provide unauthorized access to administrative functions and sensitive system information. The vulnerability specifically targets the authentication mechanisms that rely on these hardcoded constants, potentially enabling privilege escalation and complete system compromise.
The operational impact of this vulnerability extends beyond simple information disclosure to encompass full account takeover capabilities, making it particularly dangerous for industrial control systems. Once an attacker obtains the hardcoded credentials, they can gain administrative access to the Trane devices, potentially leading to unauthorized modification of building automation settings, disruption of critical HVAC operations, and access to sensitive operational data. This vulnerability directly impacts the CIA triad by compromising confidentiality through information disclosure, integrity through unauthorized system modifications, and availability through potential service disruption. The affected systems are commonly deployed in critical infrastructure environments including hospitals, data centers, and manufacturing facilities where such compromises could result in significant safety, operational, and financial risks.
Organizations utilizing Trane Tracer SC, Tracer SC+, and Tracer Concierge systems should implement immediate mitigation strategies including firmware updates from Trane, network segmentation to limit access to these devices, and comprehensive monitoring of network traffic for suspicious activity. Security teams should also conduct thorough vulnerability assessments to identify any additional hardcoded credentials throughout their industrial control system infrastructure. The MITRE ATT&CK framework categorizes this vulnerability under T1078 Valid Accounts and T1566 Phishing, as attackers may leverage the hardcoded credentials to establish persistent access to systems and potentially expand their attack surface. Additionally, this vulnerability aligns with the NIST Cybersecurity Framework's Identify and Protect functions, emphasizing the need for continuous monitoring and protection of critical system components. Organizations should also consider implementing network access controls, intrusion detection systems, and regular security audits to prevent exploitation of such hardcoded credential vulnerabilities in their industrial environments.