Is CVE-2018-8859 in the CISA KEV catalog?

No. CVE-2018-8859 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-8859?

CVE-2018-8859 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2018-8859?

CVE-2018-8859 has an EPSS score of 1.58% (72th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-8859?

Upgrade smartserver 2 firmware to 4.11.007 or later.

CVE & CISA-KEV Catalog

CVE-2018-8859

CRITICALEPSS 72th pctl

9.8

CVSS v3

NVD

Description

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. An attacker can bypass the required authentication specified in the security configuration file by including extra characters in the directory name when specifying the directory to be accessed. This vulnerability does not affect the i.LON 600 product.

CWE-288 CWE-287Improper Authentication

How to fix

Remediation Available

smartserver 2 firmwareNVD

Affected:< 4.11.007Fixed in:4.11.007CVE-2018-8859derived from NVD

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

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.58%probability of exploitation in 30 days

72ndpercentile

Elevated risk: more likely to be exploited than 72% of all known CVEs.

References

Third-Party Advisory1

ics-cert.us-cert.gov

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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.