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CVE-2025-61736

iSTAR- Improper Validation of Certificate Expiration

HIGH
7.1
CVSS Score
Published: December 17, 2025 at 12:36 PM UTC
Updated: June 17, 2026 at 09:50 AM UTC
5 products affected across 1 vendoriSTAR UltraiSTAR Ultra LTiSTAR Ultra SE

Using iSTAReX, iSTAR Edge, iSTAR Ultra LT, iSTAR Ultra , iSTAR Ultra SE by Johnson Controls?

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Severity
HIGH7.1
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.1HIGHjci
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-298

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