CVE-2021-4161

mediumpriority · track · 30OT risk · elevatedEPSS 0.007 · 53 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.70% (53rd) EPSS

CVSS 5 · medium

Is it mine?

15 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

The affected products contain vulnerable firmware, which could allow an attacker to sniff the traffic and decrypt login credential details. This could give an attacker admin rights through the HTTP web server.

remediations

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

No vendor fix yet; a mitigation is available.

MitigationMGate MB3180 Seriescisa_csaf_ot
Enable 'HTTPS' and disable the HTTP console function under 'Console Settings'
MitigationMGate MB3280 Seriescisa_csaf_ot
Enable 'HTTPS' and disable the HTTP console function under 'Console Settings'
MitigationMGate MB3480 Seriescisa_csaf_ot
Enable 'HTTPS' and disable the HTTP console function under 'Console Settings'

cvss

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

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 5–9.8

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

v3.09.8criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · CISA US

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · ics-cert@hq.dhs.gov USexploitability 3.9 · impact 5.9

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-319USCWE-319USCWE-319US

affected products (15)

Products and version ranges known to be affected.

MGate MB3180 Series: Firmware Version 2.2 or lowerall versionscisa_csaf_otUS
MGate MB3280 Series: Firmware Version 4.1 or lowerall versionscisa_csaf_otUS
MGate MB3480 Series: Firmware Version 3.2 or lowerall versionscisa_csaf_otUS
Moxa MGate MB3180 Series≤ 2.2cisa_csaf_otUS
Moxa MGate MB3280 Series≤ 4.1cisa_csaf_otUS
Moxa MGate MB3480 Series≤ 3.2cisa_csaf_otUS
Moxa MGate MB3180 Seriesall → 2.2enisa_euvdEU
Moxa MGate MB3280 Series≤ all 4.1enisa_euvdEU
Moxa MGate MB3480 Series≤ all 3.2enisa_euvdEU
Moxa Inc. Moxa MGate MB3180≤ 2.2fstec_bduRU
Moxa Inc. Moxa MGate MB3280≤ 4.1fstec_bduRU
Moxa Inc. Moxa MGate MB3480≤ 3.2fstec_bduRU
moxa mgate mb3180 firmware≤ 2.2nvdUScpe:2.3:o:moxa:mgate_mb3180_firmware:*:*:*:*:*:*:*:*
moxa mgate mb3280 firmware≤ 4.1nvdUScpe:2.3:o:moxa:mgate_mb3280_firmware:*:*:*:*:*:*:*:*
moxa mgate mb3480 firmware≤ 3.2nvdUScpe:2.3:o:moxa:mgate_mb3480_firmware:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-21-357-01Moxa MGate Protocol Gateways2021-12-23icsa · cisa_csaf_otUS
Successful exploitation of this vulnerability could allow remote attackers to obtain sensitive information.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisa_csaf_ot nvd NVD CVE.org MITRE

published 2021-12-27modified 2026-06-17

references (7)

External citations — patches, advisories, analysis.

scry

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