A hard-coded cryptographic key vulnerability was identified in Red Lion Controls Sixnet-Managed Industrial Switches running firmware Versio…

published 2018-05-09 8 y ago modified 2026-06-17 4 mo ago also EUVD-2016-10145

cvss: 10.0; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.5%; EPSS 1.5% chance of exploitation in 30 days, percentile 75%
public exploits: 0; none known

A hard-coded cryptographic key vulnerability was identified in Red Lion Controls Sixnet-Managed Industrial Switches running firmware Version 5.0.196 and Stride-Managed Ethernet Switches running firmware Version 5.0.190. Vulnerable versions of Stride-Managed Ethernet switches and Sixnet-Managed Industrial switches use hard-coded HTTP SSL/SSH keys for secure communication. Because these keys cannot be regenerated by users, all products use the same key. The attacker could disrupt communication or compromise the system. CVSS v3 base score: 10, CVSS vector string: (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H). Red Lion Controls recommends updating to SLX firmware Version 5.3.174.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-17-054-02 updated 2017-02-23 cvss 10.0

Red Lion Controls Sixnet-Managed Industrial Switches, AutomationDirect STRIDE-Managed Ethernet Switches Vulnerability

Red Lion, AutomationDirect Sixnet-Managed Industrial Switches running firmware <= 5.0.196 Red Lion, AutomationDirect Stride-Managed Ethernet Switches running firmware <= 5.0.190
affected: mitigation “Red Lion Controls has released SLX firmware Version 5.3.174 to address the hard-coded cryptographic keys issue.”

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

1.54% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.0	10.0	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

Red Lion Controls Sixnet-Managed Industrial Switches
AutomationDirect STRIDE-Managed Ethernet Switch models

Classification

Weakness

CWE-321 Use of Hard-coded Cryptographic Key
CWE-798 Use of Hard-coded Credentials

References

ics-cert.us-cert.gov /advisories/ICSA-17-054-02
third-party-advisory, us-government-resource

Sources

CVE List CVE-2016-9335
NVD CVE-2016-9335

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary