Which versions of Tracer Sc Firmware are affected by CVE-2026-28252?

CVE-2026-28252 presents critical security risk, a broken cryptography vulnerability rated CVSS 9.2.

How to fix or mitigate CVE-2026-28252?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. Monitor vendor channels for patch availability.

Tracer Sc Firmware CVE-2026-28252

Q: What is the CVSS score of CVE-2026-28252?

CVE-2026-28252 has a CVSS 4.0 base score of 9.2 (Critical). CVSS vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.1%.

CRITICAL

Use of a Broken or Risky Cryptographic Algorithm (CWE-327)

2026-03-12 ics-cert@hq.dhs.gov

Authentication Bypass Tracer Sc Firmware Tracer Concierge Trane

9.2

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

9.2 CRITICAL

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 19:57 vuln.today

CVE Published

Mar 12, 2026 - 18:16 nvd

CRITICAL 9.2

DescriptionCVE.org

A Use of a Broken or Risky Cryptographic Algorithm vulnerability in Trane Tracer SC, Tracer SC+, and Tracer Concierge could allow an attacker to bypass authentication and gain root-level access to the device.

AnalysisAI

Trane Tracer SC, SC+, and Concierge building automation controllers use broken cryptographic algorithms that allow attackers to bypass authentication and gain root access. These are critical building management systems controlling HVAC in commercial facilities.

Technical ContextAI

The authentication mechanism relies on broken or risky cryptographic algorithms (CWE-327) that an attacker can exploit to forge authentication tokens or decrypt credentials. Root access to a building automation controller provides control over HVAC, potentially affecting physical safety and comfort.

RemediationAI

Contact Trane for firmware updates. Isolate building automation networks from corporate IT. Implement network monitoring for anomalous BACnet/IP traffic. Apply defense-in-depth with firewalls between BAS and other networks.