Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-78049

CVE-2026-78049LOW

Systerel S2OPC AddNodes Service sopc_node_mgt_helper_internal.c out-of-bounds

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   H   N   N   N   N   N   L    2.9   .0062   48.1     —

AFFECTED
  Product  Versions  Fixed
  S2OPC    1.7.0 –   —

TIMELINE
  Aug 22  Reserved by VulDB
  Aug 22  Published (CNA: VulDB)
  Aug 26  EXPLOIT PUBLISHED — CVE-2026-78049 (Systerel S2OPC). Public exploit reference added.

CWE-119, CWE-125 · CNA: VulDB · CVSS v4.0 · 8 references · NVD status: Deferred

Description

A vulnerability has been found in Systerel S2OPC up to 1.7.3. Impacted is the function SOPC_NodeMgtHelperInternal_AddVariableNodeAttributes of the file src/ClientServer/address_space/internal/sopc_node_mgt_helper_internal.c of the component AddNodes Service. The manipulation of the argument UserAccessLevel leads to out-of-bounds read. It is possible to initiate the attack remotely. A high degree of complexity is needed for the attack. The exploitability is considered difficult. The exploit has been disclosed to the public and may be used. The identifier of the patch is aafbd37d381b618312ebdf5ddf57027f62c14fdd. It is suggested to install a patch to address this issue.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 22, 2026	Reserved	Reserved by VulDB
August 22, 2026	Published	Published (CNA: VulDB)
August 26, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-78049 (Systerel S2OPC). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Systerel	S2OPC	—	1.7.0	—

Weaknesses

CWE-119 · CWE-125

References (8)

Authoritative record: CVE-2026-78049 at cve.org

Vendors: systerel

Weaknesses: CWE-119 · CWE-125

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-78049 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.