Watchfire Controller Software

View CSAF Summary Successful exploitation of this vulnerability could allow a malicious user the ability to deliver malicious firmware that can update and gain full control of the controller. The following versions of Watchfire Controller Software are affected: BC550 12.30 (CVE-2026-5846) BC750 11.33 (CVE-2026-5846) BC750 12.35 (CVE-2026-5846) BC760 12.38 (CVE-2026-5846) BC760 13.00 (CVE-2026-5846) BC760DC 12.39 (CVE-2026-5846) CVSS Vendor Equipment Vulnerabilities v3 5.7 Watchfire Watchfire Controller Software Use of Hard-coded Cryptographic Key Background Critical Infrastructure Sectors: Commercial Facilities, Critical Manufacturing, Healthcare and Public Health, Financial Services Countries/Areas Deployed: United States, Dominican Republic, Canada, Peru, El Salvador Company Headquarters Location: United States Vulnerabilities Expand All + CVE-2026-5846 The affected product contains self-signed hard-coded RSA private keys and corresponding X.509 certificates used for authenticating and encrypting HTTPS/TLS connections to the controller's built-in web management interface. These keys are embedded in plaintext within the application patch binaries in the firmware directly from Watchfire's Remote Support filestore. View CVE Details Affected Products Watchfire Controller Software Vendor: Watchfire Product Version: Watchfire BC550: 12.30, Watchfire BC750: 11.33, Watchfire BC750: 12.35, Watchfire BC760: 12.38, Watchfire BC760: 13.00, Watchfire BC760DC: 12.39 Product Status: known_affected Remediations Mitigation Watchfire has applied the required security patch to all affected controllers under its management. Watchfire recommends users verify their controller software version and upgrade to one of the approved versions below, if they are not already on an approved patch level. Vendor fix Watchfire has issued patches to disable the use of the existing certificates. Users using BC550; 12.30 should upgrade to 12.31 SP1 Vendor fix Watchfire has issued patches to disable the use of the existing certificates. Users using BC750; 11.33 should upgrade to 11.34 Vendor fix Watchfire has issued patches to disable the use of the existing certificates. Users using BC750; 12.35 should upgrade to 12.36 SP1 Vendor fix Watchfire has issued patches to disable the use of the existing certificates. Users using BC760; 12.38 should upgrade to 12.41 SP1 Vendor fix Watchfire has issued patches to disable the use of the existing certificates. Users using BC760; 13.00 should upgrade to 14.00 SP1 Vendor fix Watchfire has issued patches to disable the use of the existing certificates. Users using BC760DC; 12.39 should upgrade to 12.41 SP1 Relevant CWE: CWE-321 Use of Hard-coded Cryptographic Key Metrics CVSS Version Base Score Base Severity Vector String 3.1 5.7 MEDIUM CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N 4.0 7.6 HIGH CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Acknowledgments Reporter Name(s): James Tillson reported this vulnerability to CISA Legal Notice and Terms of Use This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy). Recommended Practices CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet. Locate control system networks and remote devices behind firewalls and isolating them from business networks. When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended