Buffer Overflow Vulnerability in Systerel S2OPC Product
CVE-2026-67866

7.5HIGH

Key Information:

Vendor

Systerel

Status
S2OPC
Vendor
CVE Published:
5 August 2026

What is CVE-2026-67866?

This vulnerability in Systerel S2OPC version 1.7.3 allows remote attackers to exploit a buffer overflow condition. By targeting the LockedStaMac_ProcessMsg_DeleteMonitoredItemsResponse and SOPC_StaMac_NewDeleteMonitoredItems functions within the client wrapper, an attacker can trigger a denial of service situation. This can impede the operation of affected systems, making them unresponsive and leaving users vulnerable to additional security risks. Preventive measures and timely updates are essential to safeguard against such threats.

References

https://github.com/gff-cw/information/issues/16
https://github.com/systerel/S2OPC/blob/master/src/ClientS...
https://github.com/systerel/S2OPC/blob/master/samples/Cli...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.