CVE-2023-3595

Name: CVE-2023-3595
Creator: NVD / NIST
Published: 2023-07-12T13:15:09.88+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 3.64%

Last modified Jun 17, 2026

CVE-2023-3595 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Where this vulnerability exists in the Rockwell Automation 1756 EN2* and 1756 EN3* ControlLogix communication products, it could allow a malicious user to perform remote code execution with persistence on the target system through maliciously crafted CIP messages. This includes the ability to modify, deny, and exfiltrate data passing through the device. . EPSS estimates a 3.64% chance of exploitation in the next 30 days.

Description

Where this vulnerability exists in the Rockwell Automation 1756 EN2* and 1756 EN3* ControlLogix communication products, it could allow a malicious user to perform remote code execution with persistence on the target system through maliciously crafted CIP messages. This includes the ability to modify, deny, and exfiltrate data passing through the device.

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

3.64%

88.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Rockwellautomation	1756-En2f Series A Firmware	All versions
Rockwellautomation	1756-En2f Series B Firmware	All versions
Rockwellautomation	1756-En2f Series C Firmware	All versions
Rockwellautomation	1756-En2t Series A Firmware	All versions
Rockwellautomation	1756-En2t Series B Firmware	All versions
Rockwellautomation	1756-En2t Series C Firmware	All versions
Rockwellautomation	1756-En2t Series D Firmware	All versions
Rockwellautomation	1756-En2tr Series A Firmware	All versions
Rockwellautomation	1756-En2tr Series B Firmware	All versions
Rockwellautomation	1756-En2tr Series C Firmware	All versions
Rockwellautomation	1756-En3tr Series A Firmware	All versions
Rockwellautomation	1756-En3tr Series B 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-2023-3595?

How severe is CVE-2023-3595?

CVE-2023-3595 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.64% probability of exploitation in the next 30 days.

How do I fix CVE-2023-3595?

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-2023-3595?

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

Scan your code now

Source: NVD / NIST