CVE-2018-8859 Vulnerability Analysis & Exploit Intelligence

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.

Published Jul 24, 2018Updated Jun 2, 2026Sources: cvelistV5, icscert

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.

Exploitation

Unreported

no source claims exploitation

EPSS

chance of exploitation in 30 days

Affects

echelon

4 products listed

CVSS base

9.8

CRITICAL

CISA SSVC assessment

Three decision points CISA publishes for the CVEs it assesses · SSVC 2.0.3. A stakeholder decision, not a severity score.

CISA

Exploitation

None

none · proof-of-concept · active

Automatable

Yes

can an attacker script all four kill-chain steps

Technical impact

Total

partial · total control of the vulnerable component

Affected scope

The catalog records vendors and products as separate lists, not pairs, so which product belongs to which vendor is not something this page can say.

Vendors (1)

echelon

Products (4)

smartserver 1smartserver 2i lon 100i lon 600

Every base score collected

Sources score independently and disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Source
9.8	CVSS 3.1	CRITICAL	—	—	cvelistV5

Weakness & attack patterns

CWE-288

Attack patterns reported against this CVE. The ATT&CK techniques below are inferred from its weakness class.

T1083File and Directory Discovery
T1211Exploitation for Defensive Evasion
T1542.002Pre-OS Boot: Component Firmware

References

1 on the record

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

Elsewhere on this site

echelonevery CVE for this vendor
CWE-288other pages naming this weakness

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.