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Johnson Controls C-CURE 9000 and Victor application server

CRITICAL
CVSS 9.6
Date 2026-07-23T06:00:00+00:00
Source cisa-csaf
Published by CISA

// Description

Successful exploitation of these vulnerabilities could allow an attacker with network access to achieve remote code execution.

// Vulnerabilities (3)

CVE ID CVSS Score Severity Description
CVE-2026-21653 9.6 critical
Under certain circumstances, successful exploitation of this vulnerability could allow an attacker to forge server-side HTTP requests from the victor Web application. This could be leveraged to interact with internal services running on the host or accessible on the local network, potentially leading to unauthorized information disclosure or lateral movement within the network.
CVE-2026-21655 8.8 high
Under certain circumstances, successful exploitation of this vulnerability could allow an unauthenticated attacker on the adjacent network to achieve arbitrary code execution on the C-CURE 9000 or victor application server, as well as connected clients (e.g., workstations of physical security personnel). Such an attack could impact physical security controls.
CVE-2026-34496 8.0 high
Under certain circumstances, successful exploitation of this vulnerability could result in low privilege users accessing unauthorized pages such as Users and Logs. Successful exploitation could allow an attacker to view sensitive system information, user account details, and audit logs beyond their intended access level, potentially enabling further attacks or unauthorized administrative actions.

// Remediations (9)

Patch: (CVE-2026-21653, CVE-2026-34496) Update all victor Web installations to version 7.0 or later, which
(CVE-2026-21653, CVE-2026-34496) Update all victor Web installations to version 7.0 or later, which contains the fix for this vulnerability. The fix has been validated through independent retest.
Mitigation: Monitor and audit - Enable detailed logging on application server hosts and monitor for anomalous pr
Monitor and audit - Enable detailed logging on application server hosts and monitor for anomalous process creation by SoftwareHouse.CrossFire.Server.exe.
Mitigation: Disable unnecessary services - If the ClientConnectionManager_NF.SynchronousServerNotification callb
Disable unnecessary services - If the ClientConnectionManager_NF.SynchronousServerNotification callback interface is not required, disable or restrict it to reduce attack surface.
Mitigation: Application whitelisting - Enforce application whitelisting on application server hosts to prevent u
Application whitelisting - Enforce application whitelisting on application server hosts to prevent unauthorized executables from being launched by the server process.
Mitigation: Intrusion detection / prevention - Deploy IDS/IPS signatures tuned to detect known .NET deserializat
Intrusion detection / prevention - Deploy IDS/IPS signatures tuned to detect known .NET deserialization exploit payloads (e.g., ysoserial.net patterns) targeting port 8999.
Mitigation: Firewall / access control lists - Implement strict firewall rules to block all unnecessary inbound c
Firewall / access control lists - Implement strict firewall rules to block all unnecessary inbound connections to port 8999 from untrusted network segments.
Mitigation: For more detailed mitigation instructions, please see Johnson Controls Product Security Advisories J
For more detailed mitigation instructions, please see Johnson Controls Product Security Advisories JCI-PSA-2026-07, JCI-PSA-2026-13, and JCI-PSA-2026-16 at the following location: https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories
Mitigation: Least privilege - Ensure the application server process runs with the minimum privileges necessary,
Least privilege - Ensure the application server process runs with the minimum privileges necessary, reducing the impact of successful exploitation.
Mitigation: For more detailed mitigation instructions, please see Johnson Controls Product Security Advisories J
For more detailed mitigation instructions, please see Johnson Controls Product Security Advisories JCI-PSA-2026-07, JCI-PSA-2026-13, and JCI-PSA-2026-16 at the following location: https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories

// References