CVE-2020-7502

Name: CVE-2020-7502
Creator: NVD / NIST
Published: 2020-06-16T20:15:15.05+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.52%

Last modified Jun 17, 2026

CVE-2020-7502 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A CWE-787: Out-of-bounds Write vulnerability exists in Modicon M218 Logic Controller (Firmware version 4.3 and prior), which may cause a Denial of Service when specific TCP/IP crafted packets are sent to the Modicon M218 Logic Controller.. EPSS estimates a 1.52% chance of exploitation in the next 30 days.

Description

A CWE-787: Out-of-bounds Write vulnerability exists in Modicon M218 Logic Controller (Firmware version 4.3 and prior), which may cause a Denial of Service when specific TCP/IP crafted packets are sent to the Modicon M218 Logic Controller.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.52%

71.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Schneider-Electric	Modicon M218 Firmware	<= 4.3

References

https://www.se.com/ww/en/download/document/SEVD-2020-161-01Vendor Advisory
https://www.se.com/ww/en/download/document/SEVD-2020-161-01Vendor Advisory

Timeline

Published: Jun 16, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-7502?

How severe is CVE-2020-7502?

CVE-2020-7502 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.52% probability of exploitation in the next 30 days.

How do I fix CVE-2020-7502?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-7502?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST