What’s Vulnerable › Vulnerabilities

CVE-2026-18790: Systerel S2OPC DeleteMonitoredItemsRequest state_machine.c out-of-bounds

• Severity: low (CVSS 3.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-04 · updated 2026-10-24
• Weakness: CWE-119

Description

A weakness has been identified in Systerel S2OPC up to 1.7.3. This affects the function LockedStaMac_ProcessMsg_DeleteMonitoredItemsResponse of the file src/ClientServer/frontend/client_wrapper/internal/state_machine.c of the component DeleteMonitoredItemsRequest Handler. This manipulation causes out-of-bounds read. The attack can only be executed locally. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

• Systerel S2OPC: 1.7.0, 1.7.1, 1.7.2, 1.7.3

References

• https://github.com/gff-cw/information/issues/13
• https://github.com/user-attachments/files/28907371/poc.zip
• https://vuldb.com/cve/CVE-2026-18790
• https://vuldb.com/submit/857761
• https://vuldb.com/vuln/385790
• https://vuldb.com/vuln/385790/cti

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