What’s Vulnerable › Vulnerabilities

CVE-2020-25159: Real Time Automation EtherNet/IP

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-11-24 · updated 2026-06-17
• Weakness: CWE-121

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.

Affected products

• Real Time Automation 499ES EtherNet/IP (ENIP) Adaptor Source Code: before 2.28 — fixed in 2.28

How to fix

Upgrade to a fixed version: Real Time Automation 499ES EtherNet/IP (ENIP) Adaptor Source Code 2.28. Check the vendor advisory for mitigations.

References

• https://us-cert.cisa.gov/ics/advisories/icsa-20-324-03
• https://us-cert.cisa.gov/ics/advisories/icsa-20-324-03

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