Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-3595 is a critical-severity Out-of-bounds Write (CWE-787) vulnerability in Rockwellautomation 1756-En2F Series A Firmware. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Security Account Manager (T1003.002); ranked in the top 7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
The vulnerability is an out-of-bounds write (CWE-787) affecting Rockwell Automation 1756 EN2* and 1756 EN3* ControlLogix communication products. It enables remote code execution with persistence when the device processes maliciously crafted CIP messages, with a CVSS 3.1 base score of 9.8 reflecting network-accessible, unauthenticated attack complexity.
An unauthenticated remote attacker can send specially formed CIP messages to achieve persistent code execution on the affected modules. Successful exploitation grants the ability to modify, deny, or exfiltrate data traversing the device.
Rockwell Automation has published mitigation guidance in its security advisory at https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1140010.
The EPSS score has remained near its peak value of 0.3940 with a current value of 0.3881, indicating sustained but not sharply increasing exploitation interest since disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-44245
Vulnerability Data
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…
more
the ability to modify, deny, and exfiltrate data passing through the device.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Vulnerability scanning and recording can discover out-of-bounds write flaws so they can be remediated.
Patching or replacing vulnerable software directly eliminates known instances of this coding weakness.
Secure-development practices (static analysis, bounds checking, code review) are the primary means of preventing out-of-bounds writes.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.