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TI-2026-15394 Aliases CVE-2026-18790GHSA-xq9j-r58r-r55p

Systerel S2OPC DeleteMonitoredItemsRequest state_machine.c out-of-bounds

Priority MEDIUM 55CWE-119Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0016 5th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SysterelS2OPC1.7.0; 1.7.1; 1.7.2; 1.7.3—No fix listedCNA
  • S2OPC VendorSysterel Affected 1.7.0; 1.7.1; 1.7.2; 1.7.3 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:systerel:s2opc:*:*:*:*:*:*:*:*——Systerel
  • cpe:2.3:a:systerel:s2opc:*:*:*:*:*:*:*:* Versions — — ·Systerel

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-18790
  2. 2026-10-03 Alias added: GHSA-xq9j-r58r-r55p

References

Exploit 1

Other 1

  • TI-2026-54290 Systerel S2OPC AddNodes Service sopc_node_mgt_helper_internal.c out-of-bounds CVSS 4.0MEDIUM 6.3
  • TI-2026-61689 S2OPC through 1.7.3 NULL Pointer Dereference in alloc_notification_message_items() CVSS 4.0MEDIUM 6.0
  • TI-2026-56960 Systerel S2OPC subscription_mgr.c use after free CVSS 4.0MEDIUM 5.3
  • TI-2026-56959 Systerel S2OPC String Array Range Writing sopc_builtintypes.c set_range_matrix_on_string_array out-of-bounds CVSS 4.0MEDIUM 5.3
  • TI-2026-08554 Improper Certificate Validation in S2OPC CVSS 3.1HIGH 7.3
  • TI-2026-15010 Improper Certificate Validation in S2OPC CVSS 3.1MEDIUM 5.6
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences