CVE-2021-22786 - CVE House
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Status published High CVE-2021-22786

A CWE-200: Information Exposure vulnerability exists that could cause the...

Vulnerability Description

A CWE-200: Information Exposure vulnerability exists that could cause the exposure of sensitive information stored on the memory of the controller when communicating over the Modbus TCP protocol. Affected Products: Modicon M340 CPU (part numbers BMXP34*) (Versions prior to V3.30), Modicon M580 CPU (part numbers BMEP* and BMEH*) (Versions prior to SV3.20), Modicon MC80 (BMKC80) (Versions prior to V1.6), Modicon M580 CPU Safety (part numbers BMEP58*S and BMEH58*S) (All Versions), Modicon Momentum MDI (171CBU*) (Versions prior to V2.3), Legacy Modicon Quantum (All Versions)

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

Affected Vendor

Schneider Electric

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Affected Software

Modicon M340 CPU (part numbers BMXP34*), Modicon M580 CPU (part numbers BMEP* and BMEH*), Modicon M580 CPU Safety (part numbers BMEP58*S and BMEH58*S), Modicon MC80 (BMKC80), Modicon Momentum CPU (171CBU*), Legacy Modicon Quantum
Vulnerable Versions:
All, All Versions

Timeline

Official Publish: February 1st, 2023
Last Modified: February 5th, 2025
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weaknesses (CWE)