High severity8.6NVD Advisory· Published Apr 9, 2026· Updated Apr 13, 2026

CVE-2026-4436

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.

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Patches

Vulnerability mechanics

References

github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-099-02.jsonnvd
lincenergysystems-my.sharepoint.com/:f:/p/h_baer/IgDYaHIhXpyLQJvnKPd6b80TAUgV7Lp8qmVYBFUb0lmr7aknvd
www.cisa.gov/news-events/ics-advisories/icsa-26-099-02nvd

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