CVE-2020-7488Network attack vector

Sensitive traffic disclosure via unencrypted controller communications

Published Apr 22, 2020 · Updated May 28, 2026

Cleartext transmission between Schneider Electric engineering software and Modicon controllers allows remote attackers to read sensitive traffic. The communication channel linking EcoStruxure Machine Expert or SoMachine with M218, M241, M251, or M258 controllers sends sensitive information without encryption; Schneider Electric has not identified the exposed fields or protocol messages. Exploitation requires network visibility into that software-to-controller traffic, and the reported impact is limited to disclosure.

CVSS severity7.5
High
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext transmission between Schneider Electric engineering software and Modicon controllers allows remote attackers to read sensitive traffic. The communication channel linking EcoStruxure Machine Expert or SoMachine with M218, M241, M251, or M258 controllers sends sensitive information without encryption; Schneider Electric has not identified the exposed fields or protocol messages. Exploitation requires network visibility into that software-to-controller traffic, and the reported impact is limited to disclosure.

The record

CVE
CVE-2020-7488
Published
Apr 22, 2020
Updated
May 28, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-319, T0842
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 22, 2020CVE publishedPublication date reported by the CVE source.
  2. May 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
T0842Network Sniffing

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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