CVE-2026-5846 (CVSS 5.7)

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.

Is your site exposed to CVE-2026-5846?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

5.7

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N

EPSS — Exploit Prediction

0.0016

Probability of exploitation

0.06%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-321 CWE-321

References

Other References

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

Frequently Asked Questions

What is CVE-2026-5846? +

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. It has a CVSS v3.1 base score of 5.7 (MEDIUM).

How severe is CVE-2026-5846? +

CVE-2026-5846 has a CVSS v3.1 score of 5.7 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0016, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-5846? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2025-15627

A cryptographic weakness exists in the Omada adoption protocol. The protocol relies on hard-coded cryptographic keys to establish trust and …

CVE-2026-85153

This vulnerability exists in the Schmooze app due to the use of hardcoded credentials and cryptographic keys in the client …

CVE-2025-34500

Deck Mate 2's firmware update mechanism accepts packages without cryptographic signature verification, encrypts them with a single hard-coded AES key …

CVE-2026-57172

DataEase is an open source data visualization and analysis tool. Prior to 2.10.24, ShareSecretManage uses a hardcoded default share link …

CVE-2026-71449

: Use of Hard-coded Cryptographic Key vulnerability in Johnson Controls EasyIO FS32 allows : Retrieve Embedded Sensitive Data. This issue …

CVE-2026-11347

The linqi application contains hardcoded cryptographic keys. Additionally, the application uses a weak algorithm with a limited ASCII charset to …

CVE-2026-5846