CVE-2026-18790
Systerel S2OPC DeleteMonitoredItemsRequest state_machine.c out-of-bounds
- State
- Published
- Severity
- 4.8 Medium
- Published
- Aug 4, 2026
- Updated
- Aug 4, 2026
- Reserved
- Aug 4, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 4.8 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 3.3 Low | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R | VulDB |
| 3.0 | 3.3 Low | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R | VulDB |
| 2.0 | 1.7 Low | AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
S2OPCSysterel |
|
References
- VDB-385790 | Systerel S2OPC DeleteMonitoredItemsRequest state_machine.c out-of-boundsvdb-entrytechnical-description
- VDB-385790 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-18790 | CVE Analysis and Reportthird-party-advisory
- Submit #857761 | Systerel S2OPC 1.7.3 Out-of-bounds Readthird-party-advisory
- https://github.com/gff-cw/information/issues/13issue-tracking
- https://github.com/user-attachments/files/28907371/poc.zipexploit
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