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Vulnerability record · CVE-2023-3595 · published 12 July 2023

CVE-2023-3595: Rockwellautomation 1756-en2f series a firmware out-of-bounds write vulnerability

Rockwellautomation · 1756 En2f Series A Firmware

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.

9.8 CVSS 3.1 Critical EPSS 5.5% · top 7.5% CWE-787 · Out-of-bounds write
9.8CVSS 3.1 base score
5.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
12Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

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

Affected products

12 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1140010 Permissions RequiredVendor Advisory
https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1140010 Permissions RequiredVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-3595), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.