CVE-2023-3127
CWE-287Published: July 11, 2023· Updated: Jun 17, 2026
Official Description
An unauthenticated user could log into iSTAR Ultra, iSTAR Ultra LT, iSTAR Ultra G2, and iSTAR Edge G2 with administrator rights.
Risk Analysis
This vulnerability allows unauthenticated users to gain administrator access to various iSTAR hardware devices. The critical CVSS score indicates a high risk of total system compromise.
No public exploit is currently known, and the vulnerability is not in the CISA KEV. It is remotely exploitable with low attack complexity.
Administrators should apply the latest firmware updates provided by Johnson Controls for the affected iSTAR devices.
Technical Analysis
CVE-2023-3127 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (4)
Quick Facts
Related CVEs (CWE-287)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-3127 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts