CVE-2026-67868

Description

A heap-based out-of-bounds write vulnerability exists in S2OPC 1.7.3 in server-side EventFilter handling during CreateMonitoredItems processing. This allows a remote attacker to execute arbitrary code.

References

• https://github.com/gff-cw/information/issues/16
• https://github.com/systerel/S2OPC/blob/b4c5c7d63cd69698461d514b905a7c92b3c377c4/src/ClientServer/services/b2c/monitored_item_event_filter_treatment_bs.c
• https://github.com/systerel/S2OPC/blob/b4c5c7d63cd69698461d514b905a7c92b3c377c4/src/ClientServer/services/b2c/monitored_item_event_filter_where_clause_bs.c
• https://github.com/systerel/S2OPC/tree/S2OPC_Toolkit_1.7.3/samples/ClientServer/demo_server_alarms
• https://gitlab.com/systerel/S2OPC/-/work_items/1779