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CVE-2026-5846

Hard-coded Cryptographic Key in Watchfire Controllers

MEDIUM
5.7
CVSS Score
Published: July 30, 2026 at 09:12 PM UTC
Updated: September 8, 2026 at 07:49 PM UTC
4 products affected across 1 vendorBC750BC550BC760DC

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Severity
MEDIUM5.7
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

BC550· Watchfire
60%
12.30
Vendor states this is fixed in 12.31 SP1 (unaffected)
BC750· Watchfire
60%
11.3312.35
Vendor states this is fixed in 11.34 (unaffected)
Vendor states this is fixed in 12.36 SP1 (unaffected)
BC760· Watchfire
60%
12.3813.00
Vendor states this is fixed in 12.41 SP1 (unaffected)
Vendor states this is fixed in 14.00 SP1 (unaffected)
BC760DC· Watchfire
60%
12.39
Vendor states this is fixed in 12.41 SP1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Source: cverecord
https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-09
Source: cverecord
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-09.json

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.7MEDIUMicscert
Attack Vector
NETWORK
Complexity
HIGH
Privileges
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-321

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