High 8.6Published Apr 9, 2026

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

Updated under an hour ago (Oct 27, 2026, 4:40 AM ET)

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It affects GPL Odorizers GPL750 (XL4) and 3 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for GPL Odorizers GPL750 (XL4)

Exploited in the last 30 days

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.

CVSS: 8.6 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Weakness (CWE): CWE-306
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: icscert
NVD analysis: Awaiting Analysis
Record last updated: Apr 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

GPL Odorizers GPL750 (XL4) gpl_odorizers:gpl750_xl4 (from the name)	from v1.0 before v6.0	CNA record
GPL Odorizers GPL750 (XL4 Prime) gpl_odorizers:gpl750_xl4_prime (from the name)	from v4.0 before v6.0	CNA record
GPL Odorizers GPL Odorizers GPL750 (XL7) gpl_odorizers:gpl750_xl7 (from the name)	from v13.0 before v20.0	CNA record
GPL Odorizers GPL Odorizers GPL750 (XL7 Prime) gpl_odorizers:gpl750_xl7_prime (from the name)	from v18.4 before v20.0	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.