CVE-2020-6995

highpriority · track · 40EPSS 0.016 · 76 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.62% (76th) EPSS

CVSS 7.5 · high

Is it mine?

62 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

In Moxa PT-7528 series firmware, Version 4.0 or lower, and PT-7828 series firmware, Version 3.9 or lower, the application utilizes weak password requirements, which may allow an attacker to gain unauthorized access.

remediations

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

No vendor fix yet; a mitigation is available.

MitigationPT-7528 Seriescisa_csaf_ot
Moxa also recommends that users apply the security patch and enable “Account Login Failure Lockout” functions to eliminate any potential risk.
MitigationPT-7828 Seriescisa_csaf_ot
Moxa also recommends that users apply the security patch and enable “Account Login Failure Lockout” functions to eliminate any potential risk.

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 · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

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

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-521USprimaryCWE-521USCWE-521US

affected products (62)

Products and version ranges known to be affected.

PT-7528 series: firmware Version 4.0 or lowerall versionscisa_csaf_otUS
PT-7828 series: firmware Version 3.9 or lowerall versionscisa_csaf_otUS
Moxa PT-7528 Series≤ 4.0cisa_csaf_otUS
Moxa PT-7828 Series≤ 3.9cisa_csaf_otUS
n/a Moxa PT-7528 series firmware, Version 4.0 or lower, PT-7828 series firmware, Version 3.9 or lower≤ Moxa PT-7528 series firmware, Version 4.0 or lower, PT-7828 series firmware, Version 3.9 or lowerenisa_euvdEU
Moxa Inc. PT-7528≤ 4.0fstec_bduRU
Moxa Inc. PT-7828≤ 3.9fstec_bduRU
moxa pt-7528-12msc-12tx-4gsfp-hv firmware≤ 4.0nvdUScpe:2.3:o:moxa:pt-7528-12msc-12tx-4gsfp-hv_firmware:*:*:*:*:*:*:*:*
moxa pt-7528-12msc-12tx-4gsfp-hv-hv firmware≤ 4.0nvdUScpe:2.3:o:moxa:pt-7528-12msc-12tx-4gsfp-hv-hv_firmware:*:*:*:*:*:*:*:*
moxa pt-7528-12msc-12tx-4gsfp-wv firmware≤ 4.0nvdUScpe:2.3:o:moxa:pt-7528-12msc-12tx-4gsfp-wv_firmware:*:*:*:*:*:*:*:*
moxa pt-7528-12msc-12tx-4gsfp-wv-wv firmware≤ 4.0nvdUScpe:2.3:o:moxa:pt-7528-12msc-12tx-4gsfp-wv-wv_firmware:*:*:*:*:*:*:*:*
moxa pt-7528-12mst-12tx-4gsfp-hv firmware≤ 4.0nvdUScpe:2.3:o:moxa:pt-7528-12mst-12tx-4gsfp-hv_firmware:*:*:*:*:*:*:*:*
moxa pt-7528-12mst-12tx-4gsfp-hv-hv firmware≤ 4.0nvdUScpe:2.3:o:moxa:pt-7528-12mst-12tx-4gsfp-hv-hv_firmware:*:*:*:*:*:*:*:*
moxa pt-7528-12mst-12tx-4gsfp-wv firmware≤ 4.0nvdUScpe:2.3:o:moxa:pt-7528-12mst-12tx-4gsfp-wv_firmware:*:*:*:*:*:*:*:*
moxa pt-7528-12mst-12tx-4gsfp-wv-wv firmware≤ 4.0nvdUScpe:2.3:o:moxa:pt-7528-12mst-12tx-4gsfp-wv-wv_firmware:*:*:*:*:*:*:*:*
moxa pt-7528-16msc-8tx-4gsfp-hv firmware≤ 4.0nvdUScpe:2.3:o:moxa:pt-7528-16msc-8tx-4gsfp-hv_firmware:*:*:*:*:*:*:*:*
moxa pt-7528-16msc-8tx-4gsfp-hv-hv firmware≤ 4.0nvdUScpe:2.3:o:moxa:pt-7528-16msc-8tx-4gsfp-hv-hv_firmware:*:*:*:*:*:*:*:*
moxa pt-7528-16msc-8tx-4gsfp-wv firmware≤ 4.0nvdUScpe:2.3:o:moxa:pt-7528-16msc-8tx-4gsfp-wv_firmware:*:*:*:*:*:*:*:*
moxa pt-7528-16msc-8tx-4gsfp-wv-wv firmware≤ 4.0nvdUScpe:2.3:o:moxa:pt-7528-16msc-8tx-4gsfp-wv-wv_firmware:*:*:*:*:*:*:*:*
moxa pt-7528-16mst-8tx-4gsfp-hv firmware≤ 4.0nvdUScpe:2.3:o:moxa:pt-7528-16mst-8tx-4gsfp-hv_firmware:*:*:*:*:*:*:*:*

showing 20 of 62

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-20-056-03Moxa PT-7528 and PT-7828 Series Ethernet Switches2020-02-25icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could crash the device or allow access to sensitive information.

also known as (4)

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 2020-03-24modified 2026-06-17

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+297 more

references (7)

External citations — patches, advisories, analysis.

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