CVE-2026-28255Network attack vector

Service credential disclosure via decryptable configuration secrets

Published Mar 12, 2026 · Updated Mar 12, 2026

Hard-coded credentials in Trane Tracer SC before 4.4 SP7 and Tracer SC+ and Tracer Concierge before 6.3.2310 allow attackers to expose service secrets. A configuration file stores globally shared remote-service credentials encrypted with device-embedded key material, allowing recovery as cleartext. Exploitation requires access to the controller filesystem or configuration data; recovered credentials enable account takeover on connected Trane services.

CVSS severity8.2
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded credentials in Trane Tracer SC before 4.4 SP7 and Tracer SC+ and Tracer Concierge before 6.3.2310 allow attackers to expose service secrets. A configuration file stores globally shared remote-service credentials encrypted with device-embedded key material, allowing recovery as cleartext. Exploitation requires access to the controller filesystem or configuration data; recovered credentials enable account takeover on connected Trane services.

The record

CVE
CVE-2026-28255
Published
Mar 12, 2026
Updated
Mar 12, 2026
Vendor
Trane
Product
Tracer SC
Classifications
CWE-798, T1552.001
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <v4.4 SP7
  2. Affected versionversion=0 <v6.3.2310

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Trane · Tracer SCversion=0 <v4.4 SP7; version=0 <v6.3.2310
Trane · Tracer Conciergeversion=0 <v6.3.2310

Published CVSS scores

8.2ICS-CERTCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
T1552.001Credentials In Files

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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