Lantronix EDS3000PS Authentication Bypass Using an Alternate Path or Channel

published 2026-03-11 8 mo ago modified 2026-09-04 2 mo ago also EUVD-2025-208589

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

Lantronix EDS3000PS series 3.2.0.0R2

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-26-069-02 updated 2026-10-08 cvss 9.8

Lantronix EDS3000PS and EDS5000 (Update B)

Lantronix EDS3000PS series <=3.1.0.0R2
affected: fixed in 3.2.0.0R2, mitigation “For more information or technical assistance, contact Lantronix support (Support@lantronix.com).” lantronix.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: total
Assessed: 7 mo ago (2026-03-12)

Exploit prediction

0.51% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADP	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Lantronix EDS3000PS series

Classification

Weakness

CWE-288 Authentication Bypass Using an Alternate Path or Channel

References

lantronix.com /technical-support/security-updates/vulnerability-disclosure-policy/vulnerability-library/?_gl=16c8bez_upMQ.._
cisa.gov /news-events/ics-advisories/icsa-26-069-02
third-party-advisory, us-government-resource
github.com /cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-069-02.json

Sources

CVE List CVE-2025-67039
NVD CVE-2025-67039

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary