CVE-2020-25159

Name: CVE-2020-25159
Creator: NVD / NIST
Published: 2020-11-24T20:15:11.633+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.90%

Last modified Jun 17, 2026

CVE-2020-25159 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 499ES EtherNet/IP (ENIP) Adaptor Source Code is vulnerable to a stack-based buffer overflow, which may allow an attacker to send a specially crafted packet that may result in a denial-of-service condition or code execution.. EPSS estimates a 2.90% chance of exploitation in the next 30 days.

Description

499ES EtherNet/IP (ENIP) Adaptor Source Code is vulnerable to a stack-based buffer overflow, which may allow an attacker to send a specially crafted packet that may result in a denial-of-service condition or code execution.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

2.90%

85.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Rtautomation	499es Ethernet\/Ip Adaptor Firmware	< 2.28

References

https://us-cert.cisa.gov/ics/advisories/icsa-20-324-03Third Party Advisory, US Government Resource
https://us-cert.cisa.gov/ics/advisories/icsa-20-324-03Third Party Advisory, US Government Resource

Timeline

Published: Nov 24, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-25159?

How severe is CVE-2020-25159?

CVE-2020-25159 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.90% probability of exploitation in the next 30 days.

How do I fix CVE-2020-25159?

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-2020-25159?

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

Scan your code now

Source: NVD / NIST