CVE-2026-4436

GPL Odorizers GPL750 Missing Authentication for Critical Function

HIGH
8.6
CVSS Score
Published: April 9, 2026 at 08:04 PM UTC
Updated: October 26, 2026 at 09:10 PM UTC
4 products affected across 1 vendorGPL750 (XL7 Prime)GPL750 (XL4)GPL750 (XL4 Prime)

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Severity
HIGH8.6
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v1.0 ≤ v < v6.01.0v1.0
Affected range stops below v6.0, so it looks safe — our inference, not a vendor statement
v4.0 ≤ v < v6.04.0v4.0
Affected range stops below v6.0, so it looks safe — our inference, not a vendor statement
v13.0 ≤ v < v20.013.0v13.0
Affected range stops below v20.0, so it looks safe — our inference, not a vendor statement
v18.4 ≤ v < v20.018.4v18.4
Affected range stops below v20.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.6HIGHicscert
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-306

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