Out-of-Bounds Read Vulnerability in Systerel S2OPC Software
CVE-2026-78049

6.3MEDIUM

Key Information:

Vendor

Systerel

Status
S2opc
Vendor
CVE Published:
22 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-78049?

A vulnerability exists in the Systerel S2OPC software, particularly affecting the AddNodes Service. The flaw is located in the SOPC_NodeMgtHelperInternal_AddVariableNodeAttributes function, where improper handling of the UserAccessLevel argument can result in an out-of-bounds read. This issue can be exploited remotely, although it requires advanced skill to execute successfully. Mitigation is possible through the application of a specific patch, which is documented in the provided references.

Affected Version(s)

S2OPC 1.7.0

S2OPC 1.7.1

S2OPC 1.7.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-78049 - Proof of Concept

References

https://vuldb.com/vuln/394290
vdb-entrytechnical-description
https://vuldb.com/vuln/394290/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-78049
third-party-advisory

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Carnegie (VulDB User)
.