CVE-2020-7504Network attack vector

Webserver service interruption via malformed network packets

Published Jun 16, 2020 · Updated Aug 4, 2024

Improper input validation in Schneider Electric Easergy T300 firmware 1.5.2 and earlier allows remote attackers to stop its webserver. The embedded webserver mishandles specially crafted network packets, but Schneider Electric has not disclosed the affected parser or validation error. Network access to the device is sufficient; exploitation interrupts the management web service without reported data disclosure, modification, or device shutdown.

CVSS severity5.3
Medium
EPSS probability1.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Schneider Electric Easergy T300 firmware 1.5.2 and earlier allows remote attackers to stop its webserver. The embedded webserver mishandles specially crafted network packets, but Schneider Electric has not disclosed the affected parser or validation error. Network access to the device is sufficient; exploitation interrupts the management web service without reported data disclosure, modification, or device shutdown.

The record

CVE
CVE-2020-7504
Published
Jun 16, 2020
Updated
Aug 4, 2024
Vendor
Schneider Electric
Product
Easergy T300
Classifications
CWE-20, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 16, 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

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Is a vulnerable build present?

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

  1. Affected versionversion=Easergy T300 (Firmware version 1.5.2 and older)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Schneider Electric · Easergy T300version=Easergy T300 (Firmware version 1.5.2 and older)

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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-20Improper Input Validation
T1499.004Application or System Exploitation

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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