How severe is CVE-2026-28253?

CVE-2026-28253 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-28253 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28253?

CVE-2026-28253 primarily affects Trane Tracer Concierge. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-28253?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-28253 have an EU (EUVD) identifier?

Yes. CVE-2026-28253 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11631.

When was CVE-2026-28253 published?

CVE-2026-28253 was published on 2026-03-12 and last updated on 2026-06-17.

CVE-2026-28253

CVE-2026-28253 is a high-severity vulnerability in Trane Tracer Concierge with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-789.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-11631
Weakness: CWE-789
Affected product: Trane Tracer Concierge
Published: 2026-03-12
Last modified: 2026-06-17

Description

A Memory Allocation with Excessive Size Value vulnerability in Trane Tracer SC, Tracer SC+, and Tracer Concierge could allow an unauthenticated attacker to cause a denial-of-service condition

Frequently asked questions

What is CVE-2026-28253?: A Memory Allocation with Excessive Size Value vulnerability in Trane Tracer SC, Tracer SC+, and Tracer Concierge could allow an unauthenticated attacker to cause a denial-of-service condition
How severe is CVE-2026-28253?: CVE-2026-28253 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-28253 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28253?: CVE-2026-28253 primarily affects Trane Tracer Concierge. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-28253?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-28253 have an EU (EUVD) identifier?: Yes. CVE-2026-28253 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11631.
When was CVE-2026-28253 published?: CVE-2026-28253 was published on 2026-03-12 and last updated on 2026-06-17.

References

https://www.cisa.gov/news-events/ics-advisories/icsa-26-071-01

Affected products (9)

cpe:2.3:o:trane:tracer_sc_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:trane:tracer_sc_firmware:4.4:service_pack1:*:*:*:*:*:*
cpe:2.3:o:trane:tracer_sc_firmware:4.4:service_pack2:*:*:*:*:*:*
cpe:2.3:o:trane:tracer_sc_firmware:4.4:service_pack3:*:*:*:*:*:*
cpe:2.3:o:trane:tracer_sc_firmware:4.4:service_pack4:*:*:*:*:*:*
cpe:2.3:o:trane:tracer_sc_firmware:4.4:service_pack5:*:*:*:*:*:*
cpe:2.3:o:trane:tracer_sc_firmware:4.4:service_pack6:*:*:*:*:*:*
cpe:2.3:o:trane:tracer_sc\+_firmware:*:*:*:*:*:*:*:*
cpe:2.3:a:trane:tracer_concierge:*:*:*:*:*:*:*:*

More vulnerabilities in Trane Tracer Concierge

CVE-2021-38450 — Critical (CVSS 9.9): The affected controllers do not properly sanitize the input containing code syntax. As a result, an attacker could…
CVE-2026-28256 — Critical (CVSS 9.8): A Use of Hard-coded, Security-relevant Constants vulnerability in Trane Tracer SC, Tracer SC+, and Tracer Concierge…
CVE-2026-28255 — Critical (CVSS 9.8): A Use of Hard-coded Credentials vulnerability in Trane Tracer SC, Tracer SC+, and Tracer Concierge could allow an…
CVE-2026-28252 — Critical (CVSS 9.8): A Use of a Broken or Risky Cryptographic Algorithm vulnerability in Trane Tracer SC, Tracer SC+, and Tracer Concierge…
CVE-2026-28254 — High (CVSS 7.5): A Missing Authorization vulnerability in Trane Tracer SC, Tracer SC+, and Tracer Concierge could allow an…

All CVEs affecting Trane Tracer Concierge →

Other CWE-789 vulnerabilities

CVE-2021-34869 — High (CVSS 8.8): This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop…
CVE-2021-34868 — High (CVSS 8.8): This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop…
CVE-2024-20260 — High (CVSS 8.6): A vulnerability in the VPN and management web servers of the Cisco Adaptive Security Virtual Appliance (ASAv) and Cisco…
CVE-2021-34867 — High (CVSS 8.2): This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop…
CVE-2026-20048 — High (CVSS 7.7): A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco Nexus 9000 Series Fabric Switches…
CVE-2026-55380 — High (CVSS 7.5): Pillow is a Python imaging library. Prior to 12.3.0, PIL/GdImageFile.py GdImageFile._open() read image dimensions from…

Browse all CWE-789 vulnerabilities →