How severe is CVE-2023-3595?

CVE-2023-3595 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-3595 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-3595?

CVE-2023-3595 primarily affects Rockwellautomation 1756-en2f Series A Firmware. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-3595?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-3595 published?

CVE-2023-3595 was published on 2023-07-12 and last updated on 2026-06-17.

CVE-2023-3595

CVE-2023-3595 is a critical-severity vulnerability in Rockwellautomation 1756-en2f Series A Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Rockwellautomation 1756-en2f Series A Firmware
Published: 2023-07-12
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-3595?: 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.
How severe is CVE-2023-3595?: CVE-2023-3595 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-3595 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-3595?: CVE-2023-3595 primarily affects Rockwellautomation 1756-en2f Series A Firmware. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-3595?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-3595 published?: CVE-2023-3595 was published on 2023-07-12 and last updated on 2026-06-17.

References

https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1140010

Affected products (12)

cpe:2.3:o:rockwellautomation:1756-en2f_series_a_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:rockwellautomation:1756-en2f_series_b_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:rockwellautomation:1756-en2f_series_c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:rockwellautomation:1756-en2t_series_a_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:rockwellautomation:1756-en2t_series_b_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:rockwellautomation:1756-en2t_series_c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:rockwellautomation:1756-en2t_series_d_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:rockwellautomation:1756-en2tr_series_a_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:rockwellautomation:1756-en2tr_series_b_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:rockwellautomation:1756-en2tr_series_c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:rockwellautomation:1756-en3tr_series_a_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:rockwellautomation:1756-en3tr_series_b_firmware:-:*:*:*:*:*:*:*

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