What’s Vulnerable › Vulnerabilities

CVE-2023-3127: Improper Authentication in iSTAR

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-07-11 · updated 2026-06-17
• Weakness: CWE-287

Description

An unauthenticated user could log into iSTAR Ultra, iSTAR Ultra LT, iSTAR Ultra G2, and iSTAR Edge G2 with administrator rights.

Affected products

• Johnsoncontrols Edge G2 Firmware: before 6.9.2; 6.9.2 — fixed in 6.9.2
• Johnson Controls iSTAR Ultra: from 6.8.6 before 6.9.2; 6.9.2 — fixed in 6.9.2
• Johnsoncontrols Istar Ultra G2 Firmware: before 6.9.2; 6.9.2 — fixed in 6.9.2
• Johnsoncontrols Istar Ultra Lt Firmware: from 6.8.6 before 6.9.2; 6.9.2 — fixed in 6.9.2

How to fix

Upgrade to a fixed version: Johnsoncontrols Edge G2 Firmware 6.9.2; Johnson Controls iSTAR Ultra 6.9.2; Johnsoncontrols Istar Ultra G2 Firmware 6.9.2; Johnsoncontrols Istar Ultra Lt Firmware 6.9.2. Check the vendor advisory for mitigations.

References

• https://www.cisa.gov/news-events/ics-advisories/icsa-23-192-02
• https://www.johnsoncontrols.com/cyber-solutions/security-advisories
• https://www.cisa.gov/news-events/ics-advisories/icsa-23-192-02
• https://www.johnsoncontrols.com/cyber-solutions/security-advisories

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