CVE-2026-28252

published 2026-03-12

CVE-2026-28252: 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…

Priority P2 65 critical 9.8 CVSS 3.1

AV N AC L PR N UI N S U C H I H A H

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.

Affected

7 ranges

Vendor	Product	Version range	Fixed in
trane	tracer_concierge	< v6.3.2310	v6.3.2310
trane	tracer_concierge	< 6.3.2310	6.3.2310
trane	tracer_sc	< v4.4 SP7	v4.4 SP7
trane	tracer_sc	< v6.3.2310	v6.3.2310
trane	tracer_sc_+_firmware	< 6.3.2310	6.3.2310
trane	tracer_sc_firmware	<= 4.4	—
trane	tracer_sc_firmware	—	—

Detection & IOCs extracted from sources · hover to see the quote

• → CVE-2026-28252 exploits a broken/risky cryptographic algorithm to bypass authentication and gain root-level access; network-facing exploitation is possible (AV:N) with high complexity (AC:H) and no privileges required — monitor for unexpected root-level sessions or authentication bypass attempts on Trane Tracer SC/SC+/Concierge devices ↗
• → CVE-2026-28254 exposes unprotected APIs accessible without authentication; monitor for unauthenticated HTTP/S requests to API endpoints on Trane Tracer SC/SC+/Concierge devices ↗
• → CVE-2026-28253 allows unauthenticated DoS via memory allocation with excessive size value; monitor for anomalous large-payload requests to Trane Tracer devices that may cause service disruption ↗

• · Affected versions: Trane Tracer SC below v4.4_SP7, Tracer SC+ below v6.3.2310, Tracer Concierge below v6.3.2310 — ensure asset inventory identifies all instances running these versions ↗
• · CVE-2026-28255 involves hard-coded credentials enabling account takeover; Trane mitigated via enhanced cloud security controls rather than a device patch — local credential exposure may persist on unpatched devices ↗
• · CVE-2026-28256 involves hard-coded security-relevant constants enabling sensitive information disclosure and account takeover; Trane communicated enhanced security controls to customers but no universal patch is listed — contact Trane for specifics ↗
• · No known public exploitation targeting these vulnerabilities has been reported to CISA as of initial publication (2026-03-12) ↗

CVSS provenance

nvd v3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd v4.0 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

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