CVE-2023-0027

Rockwell Automation Modbus TCP AOI Server Could Leak Sensitive Information

MEDIUM
4.3
CVSS Score
Published: March 17, 2023 at 04:52 PM UTC
Updated: June 17, 2026 at 05:24 AM UTC
1 product affected across 1 vendorModbus TCP Server Add On Instructions

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.8%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

2.00.00 ≤ v < 2.04.002.00.00 - 2.00.03
Affected range stops below 2.04.00, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-200

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