GPL Odorizers GPL750 Missing Authentication for Critical Function_CVE-2026-4436

{
    "lastseen": "",
    "description": "A low-privileged remote attacker can send Modbus packets to manipulate \nregister values that are inputs to the odorant injection logic such that\n too much or too little odorant is injected into a gas line.",
    "published": "2026-04-09T20:04:26.208Z",
    "modified": "2026-04-09T20:04:26.208Z",
    "type": "cve",
    "title": "GPL Odorizers GPL750 Missing Authentication for Critical Function",
    "source": "icscert",
    "references": "https://lincenergysystems-my.sharepoint.com/:f:/p/h_baer/IgDYaHIhXpyLQJvnKPd6b80TAUgV7Lp8qmVYBFUb0lmr7ak?e=JLeADm\nhttps://www.cisa.gov/news-events/ics-advisories/icsa-26-099-02\nhttps://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-099-02.json",
    "id": "CVE-2026-4436",
    "bulletinFamily": "",
    "cwe": [
        "CWE-306"
    ],
    "cvelist": null,
    "sourceData": "GPL Odorizers GPL750 (XL4) v1.0\nGPL Odorizers GPL750 (XL4 Prime) v4.0\nGPL Odorizers GPL Odorizers GPL750 (XL7) v13.0\nGPL Odorizers GPL Odorizers GPL750 (XL7 Prime) v18.4",
    "sourceHref": "",
    "cvss": {
        "score": 8.6,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "GPL750 (XL4)",
    "version": "v1.0",
    "vendor": "GPL Odorizers",
    "ai_description": "Missing authentication for critical function in GPL Odorizers GPL750 allows remote attackers to manipulate register values, potentially leading to incorrect odorant injection into a gas line.",
    "ai_severity": "High",
    "ai_vendor": "GPL Odorizers",
    "ai_product": "GPL750",
    "ai_version": "v1.0, v4.0, v13.0, v18.4",
    "ai_score": 8.6
}