CVE-2023-3595 | Rockwell Automation ControlLogix Communication Modules Vulnerable to Remote Code Execution

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.

Published: 2023-07-12 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-3595 is rated High Risk (65/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 3.64%). High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-3595

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 31.38% 3.64% -27.74%
2 2026-06-13 38.81% 31.38% -7.43%
3 2026-06-06 — 38.81% —

Full EPSS history (27 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-3595

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2023-3595

Affected software / configurations for CVE-2023-3595

Vendor Product Version Raw CPE
rockwellautomation 1756-en2f_series_a_firmware — cpe:2.3:o:rockwellautomation:1756-en2f_series_a_firmware:-:*:*:*:*:*:*:*
rockwellautomation 1756-en2f_series_b_firmware — cpe:2.3:o:rockwellautomation:1756-en2f_series_b_firmware:-:*:*:*:*:*:*:*
rockwellautomation 1756-en2f_series_c_firmware — cpe:2.3:o:rockwellautomation:1756-en2f_series_c_firmware:-:*:*:*:*:*:*:*
rockwellautomation 1756-en2t_series_a_firmware — cpe:2.3:o:rockwellautomation:1756-en2t_series_a_firmware:-:*:*:*:*:*:*:*
rockwellautomation 1756-en2t_series_b_firmware — cpe:2.3:o:rockwellautomation:1756-en2t_series_b_firmware:-:*:*:*:*:*:*:*
rockwellautomation 1756-en2t_series_c_firmware — cpe:2.3:o:rockwellautomation:1756-en2t_series_c_firmware:-:*:*:*:*:*:*:*
rockwellautomation 1756-en2t_series_d_firmware — cpe:2.3:o:rockwellautomation:1756-en2t_series_d_firmware:-:*:*:*:*:*:*:*
rockwellautomation 1756-en2tr_series_a_firmware — cpe:2.3:o:rockwellautomation:1756-en2tr_series_a_firmware:-:*:*:*:*:*:*:*
rockwellautomation 1756-en2tr_series_b_firmware — cpe:2.3:o:rockwellautomation:1756-en2tr_series_b_firmware:-:*:*:*:*:*:*:*
rockwellautomation 1756-en2tr_series_c_firmware — cpe:2.3:o:rockwellautomation:1756-en2tr_series_c_firmware:-:*:*:*:*:*:*:*
rockwellautomation 1756-en3tr_series_a_firmware — cpe:2.3:o:rockwellautomation:1756-en3tr_series_a_firmware:-:*:*:*:*:*:*:*
rockwellautomation 1756-en3tr_series_b_firmware — cpe:2.3:o:rockwellautomation:1756-en3tr_series_b_firmware:-:*:*:*:*:*:*:*

References for CVE-2023-3595

cvelogic Threat Intelligence