CVE-2018-8851
CRITICALDescription
Echelon SmartServer 1 all versions, SmartServer 2 all versions prior to release 4.11.007, i.LON 100 all versions, and i.LON 600 all versions. The devices store passwords in plaintext, which may allow an attacker with access to the configuration file to log into the SmartServer web user interface.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Moderate risk: more likely to be exploited than 68% of all known CVEs.
References
Related Vulnerabilities
Other CWE-256 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-28736 | High | 7.1 | 2.5% | - | - |
| CVE-2019-10921 | High | 7.5 | 2.4% | - | Fix |
| CVE-2017-16714 | Critical | 9.8 | 2.4% | - | Fix |
| CVE-2024-26165 | High | 8.8 | 1.9% | - | Fix |
| CVE-2020-8183 | High | 7.5 | 1.9% | - | Fix |
| CVE-2020-6961 | Critical | 10.0 | 1.6% | - | - |
Common questions
How do I fix CVE-2018-8851?
Upgrade smartserver 2 firmware to 4.11.007 or later.
Is CVE-2018-8851 being actively exploited?
Not that we know of. CVE-2018-8851 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.3% is the estimated probability that it will be exploited in the next 30 days. That is higher than 68% of all scored CVEs.
How severe is CVE-2018-8851?
CVE-2018-8851 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2018-8851 affect?
Published advisories record a fix for smartserver 2 firmware (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-02.