CVE-2020-7584

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-07-14 · updated 2026-06-17
Weakness: CWE-400

Description

A vulnerability has been identified in SIMATIC S7-200 SMART CPU family (All versions >= V2.2 < V2.5.1). Affected devices do not properly handle large numbers of new incomming connections and could crash under certain circumstances. An attacker may leverage this to cause a Denial-of-Service situation.

Affected products

Siemens Simatic S7-200 Smart Sr Cpu Firmware: from 2.2 before 2.5.1 — fixed in 2.5.1
Siemens Simatic S7-200 Smart St Cpu Firmware: from 2.2 before 2.5.1 — fixed in 2.5.1

How to fix

Upgrade to a fixed version: Siemens Simatic S7-200 Smart Sr Cpu Firmware 2.5.1; Siemens Simatic S7-200 Smart St Cpu Firmware 2.5.1. Check the vendor advisory for mitigations.

References

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