What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.1 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-17 · updated 2026-06-17
• Weakness: CWE-298

Description

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

Affected products

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

References

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

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