CVE-2026-67868

A heap-based out-of-bounds write vulnerability exists in S2OPC 1.7.3 in server-side EventFilter...

9.8 Critical

A heap-based out-of-bounds write vulnerability exists in S2OPC 1.7.3 in server-side EventFilter handling during CreateMonitoredItems processing. This allows a remote attacker to execute arbitrary code.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

1.06%Up 0.8 points since Aug 18, 2026

What each source reports

CVE List Score used 9.8

Record: CVE-2026-67868
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-122
Updated: 2026-11-02

EUVDEUVD-2026-60552 9.8

Record: EUVD-2026-60552
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-jrr4-6mjm-2xj8 9.8

A heap-based out-of-bounds write vulnerability exists in S2OPC 1.7.3 in server-side EventFilter...

Record: GHSA-jrr4-6mjm-2xj8
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-122
Updated: 2026-11-02

NVD 9.8

Record: CVE-2026-67868
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-122
Updated: 2026-11-02

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-67868 is a critical vulnerability (CVSS 9.8), published August 17, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.06%, the 64th percentile. No source names a fixed version.