CVE-2023-3595

9.8 CRITICAL 6% exploit odds Fix listed Memory safety Device

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
Exploit odds: 5.5% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2023-07-12 13:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 06:14 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 5.5% in the next 30 days (EPSS).
Severity: 9.8 CRITICAL (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2023-07-12 13:15 UTC
Last modified: 2026-06-17 06:14 UTC
Exploit probability: 5.5% · EPSS, next 30 days
Weakness: CWE-787 · Out-of-bounds write
Record status: Modified

Affected

Rockwellautomation 1756-en2f Series A Firmware
Rockwellautomation 1756-en2f Series B Firmware
Rockwellautomation 1756-en2f Series C Firmware
Rockwellautomation 1756-en2t Series A Firmware
Rockwellautomation 1756-en2t Series B Firmware
Rockwellautomation 1756-en2t Series C Firmware
Rockwellautomation 1756-en2t Series D Firmware
Rockwellautomation 1756-en2tr Series A Firmware

Attack profile CVSS 3.1 · 9.8

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Raw vector

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

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record