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Vulnerabilities

Vulnerability · CVE-2025-61736

Successful exploitation of this vulnerability could result in the product failing to re-establish communication once the certificate expires.

Published Dec 17, 2025 · catalog updated Dec 17, 2025 · Johnson Controls iSTAReX, iSTAR Edge, iSTAR Ultra LT, iSTAR Ultra , iSTAR Ultra SE

Last checked Nov 2, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-61736. EPSS is 0.10%. Act only if a listed version of Johnson Controls iSTAReX, iSTAR Edge, iSTAR Ultra LT, iSTAR Ultra , iSTAR Ultra SE is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.10%
Remediation
Advisory link
Affected products
vendor Johnson Controls iSTAReX, iSTAR Edge, iSTAR Ultra LT, iSTAR Ultra , iSTAR Ultra SE iSTAR All versions prior to TLS 1.2

Successful exploitation of this vulnerability could result in the product failing to re-establish communication once the certificate expires.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Johnson Controls iSTAReX, iSTAR Edge, iSTAR Ultra LT, iSTAR Ultra , iSTAR Ultra SE iSTAR All versions prior to TLS 1.2iSTAR All versions prior to TLS 1.2

How to fix CVE-2025-61736

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-61736. EPSS is 0.10%. Act only if a listed version of Johnson Controls iSTAReX, iSTAR Edge, iSTAR Ultra LT, iSTAR Ultra , iSTAR Ultra SE is installed.

Which versions are affected?

Compare what you have installed with Johnson Controls iSTAReX, iSTAR Edge, iSTAR Ultra LT, iSTAR Ultra , iSTAR Ultra SE iSTAR All versions prior to TLS 1.2 iSTAR All versions prior to TLS 1.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.10%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 17, 2025 · EUVD

    Detected

    Successful exploitation of this vulnerability could result in the product failing to re-establish communication once the certificate expires.

  2. Dec 17, 2025 · EUVD

    Updated

    Successful exploitation of this vulnerability could result in the product failing to re-establish communication once the certificate expires.

Sources

  • CVE.orgVulnerability recordCVE-2025-61736

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-61736

    30-day exploitation probability 0.10%

    first.org
  • EUVDVulnerability recordEUVD-2025-203896

    Successful exploitation of this vulnerability could result in the product failing to re-establish communication once the certificate expires.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 2, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 2, 2026
  • CVE.orgNov 2, 2026
  • EUVDNov 1, 2026