CVE-2023-3596

Name: CVE-2023-3596
Creator: NVD / NIST
Published: 2023-07-12T13:15:09.947+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.09%

Last modified Jun 17, 2026

CVE-2023-3596 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Where this vulnerability exists in the Rockwell Automation 1756-EN4* Ethernet/IP communication products, it could allow a malicious user to cause a denial of service by asserting the target system through maliciously crafted CIP messages. . EPSS estimates a 2.09% chance of exploitation in the next 30 days.

Description

Where this vulnerability exists in the Rockwell Automation 1756-EN4* Ethernet/IP communication products, it could allow a malicious user to cause a denial of service by asserting the target system through maliciously crafted CIP messages.

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

2.09%

79.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Rockwellautomation	1756-En4tr Firmware	All versions
Rockwellautomation	1756-En4trk Firmware	All versions
Rockwellautomation	1756-En4trxt Firmware	All versions

References

https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1140010Permissions Required, Vendor Advisory
https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1140010Permissions Required, Vendor Advisory

Timeline

Published: Jul 12, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-3596?

How severe is CVE-2023-3596?

CVE-2023-3596 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.09% probability of exploitation in the next 30 days.

How do I fix CVE-2023-3596?

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-2023-3596?

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

Scan your code now

Source: NVD / NIST