CVE-2026-4436
High
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.
SeverityHigh
CVSS8.6
Exploit probability—
ProductGPL750 (XL4)
PublishedApr 9, 2026
First seenApr 9, 2026
Weakness typeCWE-306Missing authentication for critical function
How to fix
Update
- GPL Odorizers GPL750 (XL4)v6.0 or later
- GPL Odorizers GPL750 (XL4 Prime)v6.0 or later
- GPL Odorizers GPL Odorizers GPL750 (XL7)v20.0 or later
- GPL Odorizers GPL Odorizers GPL750 (XL7 Prime)v20.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| GPL Odorizers GPL750 (XL4) | v1.0 ≤ v < v6.0 | v6.0 |
| GPL Odorizers GPL750 (XL4 Prime) | v4.0 ≤ v < v6.0 | v6.0 |
| GPL Odorizers GPL Odorizers GPL750 (XL7) | v13.0 ≤ v < v20.0 | v20.0 |
| GPL Odorizers GPL Odorizers GPL750 (XL7 Prime) | v18.4 ≤ v < v20.0 | v20.0 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.