VULNERABILITY INTELLIGENCE

CVE-2020-7559

CVSS score7.5 HIGH

EPSS probability1.91%

CISA KEVNot currently listed

Published2020-11-19

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

A CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability exists in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) that could cause a crash of the PLC simulator present in EcoStruxureª Control Expert software when receiving a specially crafted request over Modbus.

Weakness classification

cybersecurity@se.com: CWE-120

Primary references

cybersecurity@se.com — Patch, Product, Vendor Advisory
cybersecurity@se.com — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Patch, Product, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory