Vulnerability · Published Dec 17, 2025 · Assigned by jci
CVE-2025-61736iSTAR- Improper Validation of Certificate Expiration
High 7.1
In plain English
A high-severity security flaw in iSTAReX, iSTAR Edge, iSTAR Ultra LT, iSTAR Ultra , iSTAR Ultra SE from Johnson Controls. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities).
Severity (CVSS 4.0)7.1High
Exploit odds (30 days)0.1%top 98.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Successful exploitation of this vulnerability could result in the product failing to re-establish communication once the certificate expires.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Johnson Controls | iSTAReX, iSTAR Edge, iSTAR Ultra LT, iSTAR Ultra , iSTAR Ultra SE | iSTAR All versions prior to TLS 1.2 |
Weakness: CWE-298 · Vector: 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