CVE-2026-67871

Buffer Overflow vulnerability in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial...

7.5 High

Buffer Overflow vulnerability in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service via the AddNodes, address_space_bs.c, sopc_node_mgt_helper_internal.c, and toolkit_test_server

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: None
Integrity: None
Availability: High

Exploit likelihood

0.82%Up 0.5 points since Aug 6, 2026

What each source reports

CVE List Score used 7.5

Record: CVE-2026-67871
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-120
Updated: 2026-11-02

EUVDEUVD-2026-53679 7.5

Record: EUVD-2026-53679
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-hp7g-qmxv-gvfg 7.5

Buffer Overflow vulnerability in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial...

Record: GHSA-hp7g-qmxv-gvfg
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-120
Updated: 2026-11-02

NVD 7.5

Record: CVE-2026-67871
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-120
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-2026-67871 is a high vulnerability (CVSS 7.5), published August 5, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.82%, the 57th percentile. No source names a fixed version.