CVE-2020-28217

mediumpriority · track · 30OT risk · elevatedEPSS 0.006 · 48 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.58% (48th) EPSS

CVSS 5 · medium

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

A CWE-311: Missing Encryption of Sensitive Data vulnerability exists in Easergy T300 (firmware 2.7 and older), that would allow an attacker to read network traffic over HTTP protocol.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

MitigationEasergy T300 with firmwarecisa_csaf_ot
Install physical controls so no unauthorized personnel can access industrial control and safety systems, components, peripheral equipment, and networks.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.06.7mediumCVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:Lsecondary · CISA US

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-311USCWE-311US

affected products (4)

Products and version ranges known to be affected.

Easergy T300 with firmware: Versions 2.7 and priorall versionscisa_csaf_otUS
Schneider Electric Software, LLC Easergy T300 with firmware≤ 2.7cisa_csaf_otUS
n/a Easergy T300 (firmware 2.7 and older)≤ Easergy T300 (firmware 2.7 and older)enisa_euvdEU
schneider-electric easergy t300 firmware≤ 2.7nvdUScpe:2.3:o:schneider-electric:easergy_t300_firmware:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-20-343-03Schneider Electric Easergy T3002020-12-08icsa · cisa_csaf_otUS
Successful exploitation of this vulnerability could allow an attacker to obtain unauthorized access to the internal product LAN, which could result in exposure of sensitive information, denial of service, and remote code execution when access to a resource from an attacker is not restricted or incorrectly restricted.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd NVD CVE.org MITRE

published 2020-12-11modified 2026-06-17

references (8)

External citations — patches, advisories, analysis.

scry

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