CVE-2016-9335

highpriority · track · 41OT risk · elevatedEPSS 0.015 · 75 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.54% (75th) EPSS

CVSS 10 · high

Is it mine?

10 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-26

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.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

MitigationSixnet-Managed Industrial Switches running firmwarecisa_csaf_ot
Red Lion Controls has released SLX firmware Version 5.3.174 to address the hard-coded cryptographic keys issue.
MitigationStride-Managed Ethernet Switches running firmwarecisa_csaf_ot
Red Lion Controls has released SLX firmware Version 5.3.174 to address the hard-coded cryptographic keys issue.

cvss

Technical severity, 0–10. One row per scoring source.

10.0

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 9.1–10

v2.010highAV:N/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 10 · impact 10

v3.010criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 6

v3.010criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hsecondary · CISA US

v3.09.1criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-798USprimaryCWE-321USCWE-321USCWE-798US

affected products (10)

Products and version ranges known to be affected.

Sixnet-Managed Industrial Switches running firmware: Version 5.0.196 and priorall versionscisa_csaf_otUS
Stride-Managed Ethernet Switches running firmware: Version 5.0.190 and priorall versionscisa_csaf_otUS
Red Lion, AutomationDirect Sixnet-Managed Industrial Switches running firmware≤ 5.0.196cisa_csaf_otUS
Red Lion, AutomationDirect Stride-Managed Ethernet Switches running firmware≤ 5.0.190cisa_csaf_otUS
STRIDE-Managed Ethernet Switch models≤ firmware Version 5.0.190 and prior.enisa_euvdEU
Sixnet-Managed Industrial Switches≤ firmware Version 5.0.196 and priorenisa_euvdEU
Red Lion Controls, Inc. Sixnet-Managed Industrial Switches≤ 5.0.196fstec_bduRU
Red Lion Controls, Inc. Stride-Managed Ethernet Switches≤ 5.0.190fstec_bduRU
redlion sixnet-managed industrial switches firmware≤ 5.0.196nvdUScpe:2.3:o:redlion:sixnet-managed_industrial_switches_firmware:*:*:*:*:*:*:*:*
redlion stride-managed ethernet switches firmware≤ 5.0.190nvdUScpe:2.3:o:redlion:stride-managed_ethernet_switches_firmware:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-17-054-02Red Lion Controls Sixnet-Managed Industrial Switches, AutomationDirect STRIDE-Managed Ethernet Switches Vulnerability2017-02-23icsa · cisa_csaf_otUS
ATTENTION: Remotely exploitable. Low skill level is needed to exploit.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisa_csaf_ot nvd NVD CVE.org MITRE

published 2018-05-09modified 2026-06-17

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+2275 more

references (4)

External citations — patches, advisories, analysis.

http://www.redlion.net/ethernet-switches-software-firmwarePatchcnnvd
https://ics-cert.us-cert.gov/advisories/ICSA-17-054-02 cnnvd
https://ics-cert.us-cert.gov/advisories/ICSA-17-054-02 enisa_euvd
https://ics-cert.us-cert.gov/advisories/ICSA-17-054-02Third Party AdvisoryUS Government Resourcenvd

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