No exploitation reported

CVE-2020-7477

No exploitation reported by the sources we read.

Published2020-03-23
WeaknessCWE-754

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Quantum Ethernet Network module 140NOE771x1 (Versions 7.0 and prior), Quantum processors with integrated Ethernet – 140CPU65xxxxx (all Versions), and Premium processors with integrated Ethernet (all Versions), which could cause a Denial of Service when sending a specially crafted command over Modbus.

Timeline

dates in UTC

2020-03-2320:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-7477?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-7477?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Schneider-electric 140cpu65150 firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Schneider-electric 140cpu65160 firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Schneider-electric 140cpu65160s firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

25 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

www.se.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2026-05-28
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.17.52026-05-28
NVDCVSS 3.17.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
CNAweakness (CWE)CWE-754read 2026-10-23
NVDweakness (CWE)CWE-754read 2026-10-23
FIRST EPSSEPSS score1.3 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2020-03-23
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-7477?

Is CVE-2020-7477 actively exploited?

Active exploitation of CVE-2020-7477 has not been confirmed. Its EPSS score was 1.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-7477?

CVE-2020-7477 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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