Watchfire Controller Software

July 30, 2026·Source: CISA

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TL;DR

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 di

What Happened

Watchfire Controller Software, reported by CISA.

v3 5.7 Watchfire Watchfire Controller Software Use of Hard-coded Cryptographic Key

For the full technical details, see the original report.

Why It Matters for Businesses

This development could affect organizations that rely on the impacted technologies or services. Unpatched systems, misconfigured infrastructure, or lack of monitoring can leave businesses exposed to exploitation, data breaches, and regulatory penalties.

How to Check Your Exposure

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Mitigation Steps

Patch immediately, Apply vendor patches or updates as soon as they are available.
Review configurations, Check firewall rules, access controls, and security headers.
Monitor logs, Watch for indicators of compromise (IOCs) related to this threat.
Update security policies, Ensure incident response plans cover this type of threat.
Run a security scan, Use automated tools to verify your exposure.

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