CVE-2026-51218

—

CVSS 3.1

7.5 high

EPSS

<1%p34

Published

Jun 29, 2026 (Jun 29, 2026)

Modified

Jul 30, 2026

Description

A heap buffer overflow in the TS7Worker::PerformFunctionWrite() function (/core/s7_server.cpp) of snap7 v1.4.3 allows attackers to cause a Denial of Service (DoS) via a crafted packet.

Weakness: CWE-122
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.4%)

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