# CVE-2025-67039: Lantronix EDS3000PS authentication bypass in management pages

Source: https://junglewise.ai/threats/cve-2025-67039-lantronix-eds3000ps-authentication-bypass-in-management-pages  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-11. Updated: 2026-06-23  
License: CC BY 4.0 with a link back

CVE-2025-67039 · Severity: critical · CVSS 9.1 · Published 2026-03-11

Lantronix EDS3000PS is a device server used to connect serial equipment to Ethernet networks for remote management. A security flaw allows unauthorized individuals to bypass the login screen and access the device's management interface. This could allow an attacker to change system settings, intercept data, or gain full control over the connected infrastructure.

Technologies: [Lantronix EDS3000PS firmware](https://junglewise.ai/threats/technologies/eds3000ps-firmware), [Lantronix Eds3008ps1ns](https://junglewise.ai/threats/technologies/eds3008ps1ns), [Lantronix Eds3008ps1ns Firmware](https://junglewise.ai/threats/technologies/eds3008ps1ns-firmware), [Lantronix Eds3016ps1ns](https://junglewise.ai/threats/technologies/eds3016ps1ns), [Lantronix Eds3016ps1ns Firmware](https://junglewise.ai/threats/technologies/eds3016ps1ns-firmware). Vendors: [Lantronix](https://junglewise.ai/threats/vendors/lantronix).

## Quick answers

**Is CVE-2025-67039 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-67039 being exploited in the wild.

**How severe is CVE-2025-67039?** Critical severity, with a CVSS score of 9.1, published 11 March 2026.

**Which products and versions are affected?** Lantronix EDS3000PS firmware 3.1.0.0R2; Lantronix Eds3008ps1ns Firmware 3.1.0.0R2; Lantronix Eds3016ps1ns Firmware 3.1.0.0R2.

**Is there a fix for CVE-2025-67039?** 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-2025-67039 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2025-67039?** Check whether you run Lantronix EDS3000PS firmware, Lantronix Eds3008ps1ns, Lantronix Eds3008ps1ns Firmware or one of the others listed 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

An authentication bypass vulnerability (CWE-288) exists in the management pages of Lantronix EDS3000PS version 3.1.0.0R2. The flaw is triggered by appending a specific suffix to the URL and providing an Authorization header with the username 'admin'. This allows a remote, unauthenticated attacker to bypass security controls and access administrative functions. When chained with other vulnerabilities like CVE-2025-70082, an attacker can change the administrator password without knowing the current one. Lantronix recommends upgrading to EDS3000PS version 3.2.0.0R2 to resolve this issue.

## Affected products

- Lantronix EDS3000PS firmware 3.1.0.0R2
- Lantronix EDS3008PS1NS firmware 3.1.0.0R2
- Lantronix EDS3016PS1NS firmware 3.1.0.0R2

## Timeline

- 2026-03-10: advisory: CISA ICS Advisory ICSA-26-069-02 published
- 2026-03-11: disclosed: CVE published to NVD

## References

- [http://eds3000ps.com/](http://eds3000ps.com/)
- [http://lantronix.com/](http://lantronix.com/)
- [https://www.cisa.gov/news-events/ics-advisories/icsa-26-069-02](https://www.cisa.gov/news-events/ics-advisories/icsa-26-069-02)

## Related threats

- [Lantronix EDS3000PS unverified password change in ltrx_evo](https://junglewise.ai/threats/cve-2025-70082-lantronix-eds3000ps-unverified-password-change-in-ltrx-evo)
- [Lantronix EDS3000PS OS command injection in TFTP client](https://junglewise.ai/threats/cve-2025-67041-lantronix-eds3000ps-os-command-injection-in-tftp-client)