CVE-2026-67872

S2OPC 1.7.3 - Denial of Service via Event Monitored-Item Queue Resize Handling

Title source: llm

Description

An issue in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service via the event monitored-item queue resize handling

References (5)

Core 5

Core References

https://gitlab.com/systerel/S2OPC/-/work_items/1788

https://github.com/systerel/S2OPC/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/services/b2c/monitored_item_notification_queue_bs.c

View Writeup ZIP pw:eip

https://github.com/systerel/S2OPC/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/services/bgenc/subscription_core.c

View Writeup ZIP pw:eip

https://github.com/systerel/S2OPC/blob/S2OPC_Toolkit_1.7.3/tests/ClientServer/validation_tests/server/toolkit_test_server.c

View Writeup ZIP pw:eip

https://github.com/systerel/S2OPC/blob/S2OPC_Toolkit_1.7.3/tests/ClientServer/validation_tests/client/toolkit_test_client_modify_event_queue.c

Scores

EPSS 0.0025

EPSS Percentile 16.3%

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact partial

Details

Status published

Published Aug 05, 2026

Tracked Since Aug 06, 2026