CVE-2026-18790
Systerel S2OPC DeleteMonitoredItemsRequest state_machine.c out-of-bounds
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.
INFO
Published Date :
Aug. 4, 2026, 6:16 p.m.
Last Modified :
Oct. 24, 2026, 4:10 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 2.0 | LOW | [email protected] | ||||
| CVSS 3.1 | LOW | [email protected] | ||||
| CVSS 4.0 | LOW | [email protected] |
Solution
- Update Systerel S2OPC to a version that fixes the vulnerability.
- Apply vendor patches if available.
- Review and sanitize input handling in state_machine.c.
- Implement bounds checking for buffer operations.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-18790.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-18790 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-18790
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-18790 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-18790 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Changed Translation Title: S2OPC de Systerel, Description: Se ha identificado una debilidad en Systerel S2OPC hasta 1.7.3. Esto afecta a la función LockedStaMac_ProcessMsg_DeleteMonitoredItemsResponse del archivo src/ClientServer/frontend/client_wrapper/internal/state_machine.c del componente Gestor de DeleteMonitoredItemsRequest. Esta manipulación causa lectura fuera de límites. El ataque solo puede ejecutarse localmente. El exploit se ha puesto a disposición del público y podría usarse para ataques. El proveedor fue contactado tempranamente sobre esta divulgación, pero no respondió de ninguna manera. Title: S2OPC de Systerel, Description: Se ha identificado una debilidad en Systerel S2OPC hasta 1.7.3. Esto afecta a la función LockedStaMac_ProcessMsg_DeleteMonitoredItemsResponse del archivo src/ClientServer/frontend/client_wrapper/internal/state_machine.c del componente Gestor de DeleteMonitoredItemsRequest. Esta manipulación causa lectura fuera de límites. El ataque solo puede ejecutarse localmente. El exploit se ha puesto a disposición del público y podría usarse para ataques. El proveedor fue contactado tempranamente sobre esta divulgación, pero no respondió de ninguna manera. -
CVE Translated by [email protected]
Oct. 23, 2026
Action Type Old Value New Value Added Translation Title: S2OPC de Systerel, Description: Se ha identificado una debilidad en Systerel S2OPC hasta 1.7.3. Esto afecta a la función LockedStaMac_ProcessMsg_DeleteMonitoredItemsResponse del archivo src/ClientServer/frontend/client_wrapper/internal/state_machine.c del componente Gestor de DeleteMonitoredItemsRequest. Esta manipulación causa lectura fuera de límites. El ataque solo puede ejecutarse localmente. El exploit se ha puesto a disposición del público y podría usarse para ataques. El proveedor fue contactado tempranamente sobre esta divulgación, pero no respondió de ninguna manera. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 04, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-18790', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-04T19:15:26.094434Z'} -
New CVE Received by [email protected]
Aug. 04, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:2.3:a:systerel:s2opc:*:*:*:*:*:*:*:*'], 'vendor': 'Systerel', 'modules': ['DeleteMonitoredItemsRequest Handler'], 'product': 'S2OPC', 'versions': [{'status': 'affected', 'version': '1.7.0'}, {'status': 'affected', 'version': '1.7.1'}, {'status': 'affected', 'version': '1.7.2'}, {'status': 'affected', 'version': '1.7.3'}]}] Added 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. Added CVSS V4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L Added CVSS V2 (AV:L/AC:L/Au:S/C:N/I:N/A:P) Added CWE CWE-119 Added CWE CWE-125 Added Reference https://github.com/gff-cw/information/issues/13 Added Reference https://github.com/user-attachments/files/28907371/poc.zip Added Reference https://vuldb.com/cve/CVE-2026-18790 Added Reference https://vuldb.com/submit/857761 Added Reference https://vuldb.com/vuln/385790 Added Reference https://vuldb.com/vuln/385790/cti