# CVE-2026-73173: Advantech EKI-1242IEIMS missing authentication in management protocol

Source: https://junglewise.ai/threats/cve-2026-73173-advantech-eki-1242ieims-missing-authentication-in-management  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-16. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-73173 · Severity: info · CVSS 8.8 · Published 2026-09-16

Advantech EKI-1242IEIMS and EKI-1242EIMS are industrial edge computing devices used to manage and control network infrastructure in critical environments. A remote attacker can bypass authentication on the management protocol and perform critical functions such as rebooting the device, reconfiguring its network settings, resetting it to factory state, or uploading new firmware—without any credentials or user interaction. This could lead to service disruption, unauthorized changes to network configuration, or deployment of malicious firmware.

Technologies: [Advantech EKI-1242EIMS](https://junglewise.ai/threats/technologies/eki-1242eims), [Advantech EKI-1242IEIMS](https://junglewise.ai/threats/technologies/eki-1242ieims). Vendors: [Advantech](https://junglewise.ai/threats/vendors/advantech).

## Quick answers

**Is CVE-2026-73173 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-73173 being exploited in the wild.

**How severe is CVE-2026-73173?** Informational severity, with a CVSS score of 8.8, published 16 September 2026.

**Which products and versions are affected?** Advantech EKI-1242EIMS V1.06.01; Advantech EKI-1242IEIMS V1.06.01.

**Is there a fix for CVE-2026-73173?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-73173 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-73173?** Check whether you run Advantech EKI-1242EIMS or Advantech EKI-1242IEIMS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a CWE-306 missing authentication flaw in the edgserver management protocol. The vulnerable component listens on TCP port 5058 and accepts crafted management requests without requiring authentication. A remote, unauthenticated attacker on the network can invoke critical device-management functions including network reconfiguration, reboot, reset, and firmware upgrade. No preconditions such as prior authentication or special privileges are required; the attack vector is network-based. Advantech has released firmware version 2.00.01 as a fix.

## Affected products

- Advantech EKI-1242IEIMS V1.06.01
- Advantech EKI-1242EIMS V1.06.01

## Timeline

- 2026-09-16: disclosed

## References

- [https://advcloudfiles.advantech.com/cms/5dafee28-ad53-4d07-a328-7896fcc24b6e/Security%20Advisory%20PDF%20File/SECURITY-ADVISORY----EKI-1242IEIMS-updated-20260904.pdf](https://advcloudfiles.advantech.com/cms/5dafee28-ad53-4d07-a328-7896fcc24b6e/Security%20Advisory%20PDF%20File/SECURITY-ADVISORY----EKI-1242IEIMS-updated-20260904.pdf)
- [https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2026-73173](https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2026-73173)

## Related threats

- [Advantech EKI-1242EIMS firmware signature verification bypass](https://junglewise.ai/threats/cve-2026-73177-advantech-eki-1242eims-firmware-signature-verification-bypass)
- [Advantech EKI-1242IEIMS OS command injection in web management interface](https://junglewise.ai/threats/cve-2026-73176-advantech-eki-1242ieims-os-command-injection-in-web-management)
- [Advantech EKI-1242 denial of service in OPC UA gateway](https://junglewise.ai/threats/cve-2026-73175-advantech-eki-1242-denial-of-service-in-opc-ua-gateway)
- [Advantech EKI-1242 cleartext transmission of sensitive information](https://junglewise.ai/threats/cve-2026-73174-advantech-eki-1242-cleartext-transmission-of-sensitive)
- [Advantech EKI-1242EIMS OS command injection in edgserver management](https://junglewise.ai/threats/cve-2026-73172-advantech-eki-1242eims-os-command-injection-in-edgserver)