CVE-2026-82619
Systerel S2OPC subscription_mgr.c use after free
- State
- Published
- Severity
- 5.3 Medium
- Published
- Aug 31, 2026
- Updated
- Aug 31, 2026
- Reserved
- Aug 30, 2026
Description
A vulnerability was identified in Systerel S2OPC up to 1.7.3. The impacted element is the function monitored_item_event_filter_treatment_bs__init_event_filter_ctx_and_result of the file src/ClientServer/services/bgenc/subscription_mgr.c. Such manipulation of the argument EventFilter leads to use after free. The attack may be performed from remote. The exploit is publicly available and might be used. The name of the patch is a4cee16a851b971be447a6ed531173702c722b99. It is best practice to apply a patch to resolve this issue.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/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 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C | VulDB |
| 3.0 | 4.3 Medium | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C | VulDB |
| 2.0 | 4.0 Medium | AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
S2OPCSysterel |
|
References
- VDB-397119 | Systerel S2OPC subscription_mgr.c use after freevdb-entrytechnical-description
- VDB-397119 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-82619 | CVE Analysis and Reportthird-party-advisory
- Submit #893148 | Systerel S2OPC OPC UA Toolkit 1.7.3 Heap Use After Freethird-party-advisory
- https://gitlab.com/systerel/S2OPC/-/work_items/1797exploit
- https://gitlab.com/systerel/S2OPC/-/merge_requests/1839patch
- https://gitlab.com/systerel/S2OPC/-/commit/a4cee16a851b971be447a6ed531173702c722b99patch
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