CVE-2026-4436

HIGH

GPL Odorizers GPL750 Missing Authentication for Critical Function

Title source: cna

Description

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.

References (3)

https://lincenergysystems-my.sharepoint.com/:f:/p/h_baer/IgDYaHIhXpyLQJvnKPd6b80TAUgV7Lp8qmVYBFUb0lmr7ak?e=JLeADm

https://www.cisa.gov/news-events/ics-advisories/icsa-26-099-02

https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-099-02.json

View Writeup ZIP pw:eip

Scores

CVSS v3 8.6

EPSS 0.0006

EPSS Percentile 19.6%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Details

CWE

CWE-306

Status published

Products (4)

GPL Odorizers/GPL750 (XL4) v1.0 - v6.0

GPL Odorizers/GPL750 (XL4 Prime) v4.0 - v6.0

GPL Odorizers/GPL Odorizers GPL750 (XL7) v13.0 - v20.0

GPL Odorizers/GPL Odorizers GPL750 (XL7 Prime) v18.4 - v20.0

Published Apr 09, 2026

Tracked Since Apr 10, 2026