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CVE-2026-4436— GPL Odorizers GPL750 Missing Authentication for Critical Function

Quick assessment

Affected
GPL Odorizers GPL750 (XL4)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GPL Odorizers GPL是美国GPL公司的一系列燃气加臭设备与气体处理控制系统。 GPL Odorizers GPL存在访问控制错误漏洞，该漏洞源于低权限远程攻击者可发送Modbus数据包操纵寄存器值，可能导致气体管线中臭剂注入过多或过少。

CVSS 8.6 · High EPSS 0.55% · P45

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-4436

Vulnerability Information
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Vulnerability Title
GPL Odorizers GPL750 Missing Authentication for Critical Function
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
GPL Odorizers GPL 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GPL Odorizers GPL是美国GPL公司的一系列燃气加臭设备与气体处理控制系统。 GPL Odorizers GPL存在访问控制错误漏洞，该漏洞源于低权限远程攻击者可发送Modbus数据包操纵寄存器值，可能导致气体管线中臭剂注入过多或过少。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
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 -

II. Public POCs for CVE-2026-4436

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III. Intelligence Information for CVE-2026-4436

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Vendor Advisories for CVE-2026-4436 (1)

IV. Related Vulnerabilities

Same weakness: CWE-306

V. Comments for CVE-2026-4436

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