CVE-2026-67866
Published Aug 5, 2026
Description
Buffer Overflow vulnerability in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service via the LockedStaMac_ProcessMsg_DeleteMonitoredItemsResponse and SOPC_StaMac_NewDeleteMonitoredItems in the client wrapper DeleteMonitoredItems path
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EPSS — Exploit Prediction
0.0047
Probability of exploitation
0.39%
Percentile rank
EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.
References
Other References
https://github.com/gff-cw/information/issues/16
https://github.com/systerel/S2OPC/blob/master/samples/ClientServer/client_wrapper/examples/subscribe.c
https://github.com/systerel/S2OPC/blob/master/src/ClientServer/frontend/client_wrapper/internal/state_machine.c
https://gitlab.com/systerel/S2OPC/-/work_items/1780
Frequently Asked Questions
What is CVE-2026-67866? +
Buffer Overflow vulnerability in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service via the LockedStaMac_ProcessMsg_DeleteMonitoredItemsResponse and SOPC_StaMac_NewDeleteMonitoredItems in the client wrapper DeleteMonitoredItems path
How do I check if I'm vulnerable to CVE-2026-67866? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.