What is CVE-2026-4436?

CVE-2026-4436 is a high-severity vulnerability in Gpl Odorizers Gpl750 (Xl4), classified under Missing Authentication for Critical Function. CVSS score: 8.6/10. Published 2026-04-09.

How severe is CVE-2026-4436?

High severity. CVSS v3 base score is 8.6 out of 10.

Auth bypass in Gpl Odorizers Gpl750 (Xl4)

CVE-2026-4436

A low-privileged remote attacker can send Modbus packets to manipulate register values that are inputs to the odorant injection logic such that too much or too little odorant is injected into a gas line.

Vulnerability class: Broken Authentication

EPSS: 0.001 (21.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N.

Affected products

Gpl Odorizers Gpl750 (Xl4) — versions v1.0
Gpl Odorizers Gpl750 (Xl4 Prime) — versions v4.0
Gpl Odorizers Gpl750 (Xl7) — versions v13.0
Gpl Odorizers Gpl750 (Xl7 Prime) — versions v18.4

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

Frequently asked questions

What is CVE-2026-4436?: CVE-2026-4436 is a high-severity vulnerability in Gpl Odorizers Gpl750 (Xl4), classified under Missing Authentication for Critical Function. CVSS score: 8.6/10. Published 2026-04-09.
How severe is CVE-2026-4436?: High severity. CVSS v3 base score is 8.6 out of 10.