Is CVE-2023-0027 actively exploited?

No active exploitation of CVE-2023-0027 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-0027 be exploited remotely?

Yes. CVE-2023-0027 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-0027?

CVE-2023-0027 has a CVSS score of 4.3 (MEDIUM).

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MEDIUM

CVE-2023-0027

CWE-200Published: March 17, 2023· Updated: Jun 17, 2026

4.3

CVSS v3.1

Official Description

Rockwell Automation Modbus TCP Server AOI prior to 2.04.00 is vulnerable to an unauthorized user sending a malformed message that could cause the controller to respond with a copy of the most recent response to the last valid request. If exploited, an unauthorized user could read the connected device’s Modbus TCP Server AOI information.

NVD Source

Technical Analysis

CVE-2023-0027 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.