How severe is CVE-2018-8859?

CVE-2018-8859 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-8859 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-8859?

CVE-2018-8859 primarily affects Echelon Smartserver 1 Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-8859?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-8859 published?

CVE-2018-8859 was published on 2018-07-24 and last updated on 2026-06-17.

CVE-2018-8859

CVE-2018-8859 is a critical-severity vulnerability in Echelon Smartserver 1 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Echelon Smartserver 1 Firmware
Published: 2018-07-24
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2018-8859?: 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.
How severe is CVE-2018-8859?: CVE-2018-8859 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-8859 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-8859?: CVE-2018-8859 primarily affects Echelon Smartserver 1 Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-8859?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-8859 published?: CVE-2018-8859 was published on 2018-07-24 and last updated on 2026-06-17.

References

https://ics-cert.us-cert.gov/advisories/ICSA-18-200-03

Affected products (4)

cpe:2.3:o:echelon:smartserver_1_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:echelon:smartserver_2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:echelon:i.lon_100_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:echelon:i.lon_600_firmware:-:*:*:*:*:*:*:*

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