---
id: CVE-2026-5846
title: "The affected\_Watchfire Controller Software\_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 int…"
summary: "The affected\_Watchfire Controller Software\_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 int…"
severity: medium
cvss: 5.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N'
cwe:
  - CWE-321
published: '2026-07-30'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T19:30:43.093'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-5846'
references:
  - url: >-
      https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-09.json
    label: ics-cert@hq.dhs.gov
  - url: 'https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-09'
    label: ics-cert@hq.dhs.gov
tags:
  - nvd
epss: 0.00163
epssPercentile: 0.05901
ingestedAt: '2026-09-08T20:10:03.155Z'
---

## Overview

The affected Watchfire Controller Software 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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.