Full Report
[Control systems] Advantech security advisory (AV26-937)
Analysis Summary
# Vulnerability: Advantech EKI-1242 Series Industrial EtherNet/IP Gateways Flaws
## CVE Details
*Note: The source article (AV26-937) identifies the presence of vulnerabilities but does not explicitly list the unique CVE IDs within the summary text. Based on Advantech's disclosure patterns for these industrial gateways:*
- **CVE ID:** Pending/Not explicitly listed in summary (Refer to vendor PDF)
- **CVSS Score:** High (Estimated based on typical advisory levels for these products)
- **CWE:** Often associated with Improper Input Validation or Broken Access Control in these models.
## Affected Systems
- **Products:**
- EKI-1242EIMS (Industrial EtherNet/IP to Modbus Gateway)
- EKI-1242IEIMS (Industrial EtherNet/IP to Modbus Gateway)
- **Versions:** All versions prior to or equal to **V2.00.01**
- **Configurations:** Default installations of the gateway hardware used in industrial control system (ICS) environments.
## Vulnerability Description
While the brief advisory references multiple vulnerabilities, these typically involve flaws in the web management interface or communication protocols of the EKI-1242 series gateways. These flaws may allow an attacker to bypass security restrictions or cause a denial-of-service (DoS) condition on the industrial communication bridge between EtherNet/IP and Modbus networks.
## Exploitation
- **Status:** Not reported as exploited in the wild (as of advisory date).
- **Complexity:** Low to Medium.
- **Attack Vector:** Network (Targeting the management interface or fieldbus protocols).
## Impact
- **Confidentiality:** Potential for unauthorized access to device configuration.
- **Integrity:** Potential for unauthorized modification of gateway mapping and data traffic.
- **Availability:** High (Risk of disrupting industrial process data flow).
## Remediation
### Patches
- Advantech recommends updating to the latest firmware version available on their support portal.
- Users should check the [Advantech Security Advisory Portal](https[:]//www[.]advantech[.]com/en/security-advisory) for specific firmware download links surpassing V2.00.01.
### Workarounds
- **Network Segmentation:** Place EKI gateways behind a firewall and isolate them from the business network/internet.
- **Access Control:** Restrict access to the device management interface to specific authorized IP addresses.
- **Disable Unused Services:** Turn off Telnet, HTTP (use HTTPS), and other unnecessary management protocols.
## Detection
- Monitor for unusual traffic patterns on TCP ports 80/443 (HTTP/S) and industrial protocol ports (502 for Modbus, 44818 for EtherNet/IP).
- Inspect logs for failed authentication attempts or unauthorized configuration changes.
## References
- Advantech Security Advisory (PDF): [https[:]//advcloudfiles[.]advantech[.]com/cms/5dafee28-ad53-4d07-a328-7896fcc24b6e/Security%20Advisory%20PDF%20File/SECURITY-ADVISORY----EKI-1242IEIMS-updated-20260904[.]pdf]
- Advantech Security Portal: [https[:]//www[.]advantech[.]com/en/security-advisory]
- Canadian Centre for Cyber Security Advisory (AV26-937): [https[:]//www[.]cyber[.]gc[.]ca/en/alerts-advisories/control-systems-advantech-security-advisory-av26-937]