CVE-2025-67039 Lantronix EDS3000PS Authentication Bypass Using an Alternate Path or Channel

Critical 9.3 Published 11 Mar 2026 Updated 4 Sep 2026

Attackers can bypass authentication on Lantronix EDS3000PS management pages by manipulating URL suffixes and headers, gaining unauthorized administrative access.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-67039?

CVE-2025-67039 is a critical authentication bypass vulnerability in Lantronix EDS3000PS series, published on 11 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in Lantronix EDS3000PS 3.1.0.0R2. The authentication on management pages can be bypassed by appending a specific suffix to the URL and by sending an Authorization header that uses "admin" as the username.

Weakness: CWE-288

Which versions are affected by CVE-2025-67039?

It affects 2 products.

Products include Lantronix Eds3008ps1ns Firmware, Lantronix Eds3016ps1ns Firmware.

How do I fix CVE-2025-67039?

No fix has been published for CVE-2025-67039 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2025-67039 being exploited?

There is no known exploitation of CVE-2025-67039 in the wild and no public exploit code.

Sources

Also known as CVE-2025-67048, GHSA-cfv5-944v-wgjm.