CVE-2026-28254
Published: 12 March 2026
Summary
CVE-2026-28254 is a high-severity Missing Authorization (CWE-862) vulnerability in Trane Tracer Sc Firmware. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 12.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Requiring an access control policy ensures authorization checks are defined and applied for critical functions.
Reviews of access controls detect missing authorization checks on critical functions or resources.
Documenting permitted unauthenticated actions prevents missing authorization by making all exceptions explicit and subject to organizational review.
Requiring attribute association with information prevents authorization from being performed without necessary security or privacy context.
Mandating authorization prior to allowing remote connections addresses missing authorization for remote access.
Mandating authorization before wireless connections are allowed prevents missing authorization for wireless access.
The control requires authorization before allowing mobile device connections, directly mitigating missing authorization for system access.
Requiring approvals for account creation and specifying authorizations ensures authorization is not missing for system access.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Missing authorization on network-accessible APIs directly enables remote exploitation of a public-facing (or network-exposed) application for initial unauthenticated access and information disclosure.
NVD Description
A Missing Authorization vulnerability in Trane Tracer SC, Tracer SC+, and Tracer Concierge could allow an unauthenticated attacker to access sensitive information through unprotected APIs.
Deeper analysisAI
CVE-2026-28254 is a Missing Authorization vulnerability (CWE-862) affecting Trane Tracer SC, Tracer SC+, and Tracer Concierge systems. Published on 2026-03-12, it stems from unprotected APIs that fail to enforce proper authentication checks, enabling unauthorized access to sensitive information. The vulnerability carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N), indicating high confidentiality impact with no effects on integrity or availability.
An unauthenticated attacker with network access to the affected systems can exploit this issue with low attack complexity and no user interaction required. Exploitation allows the attacker to retrieve sensitive data exposed through the vulnerable APIs, potentially leading to information disclosure without requiring privileges or special conditions.
The CISA advisory ICSA-26-071-01 provides details on mitigation strategies for this vulnerability; security practitioners should consult https://www.cisa.gov/news-events/ics-advisories/icsa-26-071-01 for recommended patches and remediation steps.
Details
- CWE(s)