Security readout for executives and security teams
Plain-English summary
This is a critical authentication-bypass issue in Echelon industrial control devices. A remote unauthenticated attacker may access protected directories by adding extra characters to a requested directory name. Successful exploitation could compromise confidentiality, integrity, and availability of affected systems.
Executive priority
Treat this as urgent for any network-reachable affected device. The issue can bypass authentication and has a critical 9.8 CVSS score, but current provided evidence does not establish active exploitation.
Technical view
CVE-2018-8859 is CWE-288 authentication bypass in Echelon SmartServer 1, SmartServer 2 before 4.11.007, and i.LON 100. The source description says crafted directory names can bypass authentication rules in the security configuration file. CVSS v3.1 is 9.8: network, low complexity, no privileges, no user interaction.
Likely exposure
Exposure is most relevant where affected Echelon SmartServer or i.LON 100 devices are reachable over a network, especially from untrusted networks. The bundle contains conflicting i.LON 600 data, but the description says i.LON 600 is not affected.
Exploitation context
The provided sources do not show active exploitation, and the CVE is not marked as CISA KEV. The CVSS vector indicates exploitation is remotely reachable and requires no credentials or user interaction, making any exposed affected device high priority.
Researcher notes
The source bundle is internally inconsistent: affected data lists i.LON 600, while the CVE description says it is not affected. Do not assume i.LON 600 exposure without confirming against the referenced advisory or vendor guidance.
Mitigation direction
- Upgrade SmartServer 2 deployments to release 4.11.007 or later.
- Check vendor or CISA guidance for SmartServer 1 and i.LON 100 remediation options.
- Restrict network access to affected device management interfaces pending vendor guidance.
- Remove internet exposure for affected devices where business operations allow.
- Track the i.LON 600 inconsistency before taking product-specific action.
Validation and detection
- Inventory Echelon SmartServer 1, SmartServer 2, i.LON 100, and i.LON 600 devices.
- Confirm SmartServer 2 firmware is release 4.11.007 or later.
- Review network paths to affected devices from untrusted networks.
- Check whether authentication controls protect sensitive directories as intended.
- Document any i.LON 600 findings separately because source data conflicts.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-288: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2018-8859 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://ics-cert.us-cert.gov/advisories/ICSA-18-200-03CVE reference, icscert · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Authentication Bypass Using an Alternate Path or Channel
Authentication Bypass Using an Alternate Path or Channel represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.