High 7.1Published Dec 17, 2025

CVE-2025-61736iSTAR- Improper Validation of Certificate Expiration

Updated under an hour ago (Oct 27, 2026, 11:30 AM ET)

Does this affect you?

It affects Johnson Controls iSTAReX, iSTAR Edge, iSTAR Ultra LT, iSTAR Ultra , iSTAR Ultra SE. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Johnson Controls iSTAReX, iSTAR Edge, iSTAR Ultra LT, iSTAR Ultra , iSTAR Ultra SE

Exploited in the last 30 days

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

CVSS: 7.1 HIGH (v4.0, CNA)CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-298
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: jci
NVD analysis: Deferred
Record last updated: Dec 17, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Johnson Controls iSTAReX, iSTAR Edge, iSTAR Ultra LT, iSTAR Ultra , iSTAR Ultra SE johnson_controls:istarex_istar_edge_istar_ultra_lt_istar_ultra_istar_ultra_se (from the name)	iSTAR All versions prior to TLS 1.2	CNA record

References

References

https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories
https://www.cisa.gov/news-events/ics-advisories/icsa-25-338-04

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.