CVE-2018-20026

Name: CVE-2018-20026
Creator: NVD / NIST
Published: 2019-02-19T21:29:00.29+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.04%

Last modified Jun 17, 2026

CVE-2018-20026 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Improper Communication Address Filtering exists in CODESYS V3 products versions prior V3.5.14.0.. EPSS estimates a 3.04% chance of exploitation in the next 30 days.

Description

Improper Communication Address Filtering exists in CODESYS V3 products versions prior V3.5.14.0.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

3.04%

85.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Codesys	Control For Beaglebone Sl	>= 3.0, < 3.5.14.0
Codesys	Control For Empc-A\/Imx6 Sl	>= 3.0, < 3.5.14.0
Codesys	Control For Iot2000 Sl	>= 3.0, < 3.5.14.0
Codesys	Control For Linux Sl	>= 3.0, < 3.5.14.0
Codesys	Control For Pfc100 Sl	>= 3.0, < 3.5.14.0
Codesys	Control For Pfc200 Sl	>= 3.0, < 3.5.14.0
Codesys	Control For Raspberry Pi Sl	>= 3.0, < 3.5.14.0
Codesys	Control Rte Sl	>= 3.0, < 3.5.14.0
Codesys	Control Rte Sl \(For Beckhoff Cx\)	>= 3.0, < 3.5.14.0
Codesys	Control Runtime Toolkit	>= 3.0, < 3.5.14.0
Codesys	Control Win Sl	>= 3.0, < 3.5.14.0
Codesys	Development System V3	>= 3.0, < 3.5.14.0
Codesys	Gateway	>= 3.0, < 3.5.14.0
Codesys	Hmi Sl	>= 3.0, < 3.5.14.0
Codesys	Opc Server	>= 3.0, < 3.5.14.0
Codesys	Plchandler	>= 3.0, < 3.5.14.0
Codesys	Safety Sil2	>= 3.0, < 3.5.14.0
Codesys	Targetvisu Sl	>= 3.0, < 3.5.14.0

References

http://www.securityfocus.com/bid/106251Broken Link, Third Party Advisory, VDB Entry
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-036-codesys-control-v3-improper-communication-address-filtering/Mitigation, Third Party Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-18-352-04Third Party Advisory, US Government Resource
http://www.securityfocus.com/bid/106251Broken Link, Third Party Advisory, VDB Entry
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-036-codesys-control-v3-improper-communication-address-filtering/Mitigation, Third Party Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-18-352-04Third Party Advisory, US Government Resource

Timeline

Published: Feb 19, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-20026?

Improper Communication Address Filtering exists in CODESYS V3 products versions prior V3.5.14.0.

How severe is CVE-2018-20026?

CVE-2018-20026 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.04% probability of exploitation in the next 30 days.

How do I fix CVE-2018-20026?

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-2018-20026?

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

Scan your code now

Source: NVD / NIST