CVE-2020-7486Network attack vector

Remote module reset via high network load

Published Apr 15, 2020 · Updated Aug 4, 2024

Denial of service in Schneider Electric Tricon TCM 10.0.0 through 10.4.x allows remote attackers to reset modules via high network load. The network-processing path fails to sustain high traffic volume and resets the TCM, but Schneider Electric has not disclosed the specific exhausted resource or code locus. No authentication or user interaction is required; a reset can interrupt SIS communications and produce denial-of-service behavior.

CVSS severity7.5
High
EPSS probability1.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Schneider Electric Tricon TCM 10.0.0 through 10.4.x allows remote attackers to reset modules via high network load. The network-processing path fails to sustain high traffic volume and resets the TCM, but Schneider Electric has not disclosed the specific exhausted resource or code locus. No authentication or user interaction is required; a reset can interrupt SIS communications and produce denial-of-service behavior.

The record

CVE
CVE-2020-7486
Published
Apr 15, 2020
Updated
Aug 4, 2024
Vendor
Schneider Electric
Product
Tricon Communication Module (TCM)
Classifications
CWE-400, T0814
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 15, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Tricon TCM Model 4351, 4352, 4351A/B, 4352A/B (v10.3.x, v10.4.x)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Schneider Electric · Tricon Communication Module (TCM)version=Tricon TCM Model 4351, 4352, 4351A/B, 4352A/B (v10.3.x, v10.4.x)

Published CVSS scores

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

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T0814Denial of Service

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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