Use After Free Vulnerability in Systerel S2OPC Affected by Remote Exploitation
CVE-2026-82619

5.3MEDIUM

Key Information:

Vendor

Systerel

Status
S2opc
Vendor
CVE Published:
31 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-82619?

A vulnerability exists in Systerel S2OPC prior to version 1.7.4, specifically in the function monitored_item_event_filter_treatment_bs__init_event_filter_ctx_and_result within the source file subscription_mgr.c. This issue arises from improper handling of the EventFilter argument, leading to a use after free scenario. This vulnerability can be exploited remotely, prompting potential unauthorized access or manipulation of the system. A patch for this issue has been made available (commit a4cee16a851b971be447a6ed531173702c722b99), and it is highly recommended to apply it to enhance the security posture of the affected software.

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-2026-82619 - Proof of Concept

References

https://vuldb.com/vuln/397119
vdb-entrytechnical-description
https://vuldb.com/vuln/397119/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-82619
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

VULL (VulDB User)
.