Welker OdorEyes EcoSystem Pulse Bypass System with XL4 Controller Missing Authentication for Critical Function

published 2026-02-20 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-8371

cvss: 8.2; 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 43%
public exploits: 0; none known

The underlying PLC of the device can be remotely influenced, without proper safeguards or authentication.

Vendor advisories

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

cisa ICSA-26-050-04 updated 2026-02-19 cvss 8.2

Welker OdorEyes EcoSystem Pulse Bypass System with XL4 Controller

Welker OdorEyes EcoSystem Pulse Bypass System with XL4 Controller
affected: mitigation “Welker did not respond to CISA's attempts at coordination. Users of Welker OdorEyes devices are encouraged to contact Welker and keep their systems up to date.” welker.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: partial
Assessed: 8 mo ago (2026-02-20)

Exploit prediction

0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

Affected products

Welker OdorEyes EcoSystem Pulse Bypass System with XL4 Controller

Classification

Weakness

CWE-306 Missing Authentication for Critical Functionality

References

Sources

CVE List CVE-2026-24790
NVD CVE-2026-24790

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