Medium 5.7Published Jul 30, 2026

CVE-2026-5846Hard-coded Cryptographic Key in Watchfire Controllers

Updated under an hour ago (Oct 26, 2026, 3:50 PM ET)

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It affects Watchfire BC550 and 3 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Watchfire BC550

Exploited in the last 30 days

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.

CVSS: 5.7 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-321
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: icscert
NVD analysis: Deferred
Record last updated: Jul 31, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Watchfire BC550 watchfire:bc550 (from the name)	12.30; 12.31 SP1 not affected	CNA record
Watchfire BC750 watchfire:bc750 (from the name)	11.33; 11.34 not affected; 12.35; 12.36 SP1 not affected	CNA record
Watchfire BC760 watchfire:bc760 (from the name)	12.38; 12.41 SP1 not affected; 13.00; 14.00 SP1 not affected	CNA record
Watchfire BC760DC watchfire:bc760dc (from the name)	12.39; 12.41 SP1 not affected	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.