{"id":"CVE-2020-6987","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-6987","generatedAt":"2026-10-27T23:38:02.311Z","title":"In Moxa PT-7528 series firmware, Version 4.0 or lower, and PT-7828 series firmware, Version 3.9 or lower, the affected products use a weak cryptographic algorithm, which may allow confidential information to be disclosed.","description":"In Moxa PT-7528 series firmware, Version 4.0 or lower, and PT-7828 series firmware, Version 3.9 or lower, the affected products use a weak cryptographic algorithm, which may allow confidential information to be disclosed.","published":"2020-03-24T19:15:21.000Z","lastModified":"2026-06-17T03:24:04.000Z","status":"Modified","sourceIdentifier":"ics-cert@hq.dhs.gov","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-327"],"affected":["moxa/pt-7528-24tx-hv firmware","moxa/pt-7528-24tx-hv-hv firmware","moxa/pt-7528-24tx-wv firmware","moxa/pt-7528-24tx-wv-hv firmware","moxa/pt-7528-24tx-wv-wv firmware","moxa/pt-7528-12msc-12tx-4gsfp-hv firmware","moxa/pt-7528-12msc-12tx-4gsfp-hv-hv firmware","moxa/pt-7528-12msc-12tx-4gsfp-wv firmware","moxa/pt-7528-12msc-12tx-4gsfp-wv-wv firmware","moxa/pt-7528-12mst-12tx-4gsfp-hv firmware","moxa/pt-7528-12mst-12tx-4gsfp-hv-hv firmware","moxa/pt-7528-12mst-12tx-4gsfp-wv firmware","moxa/pt-7528-12mst-12tx-4gsfp-wv-wv firmware","moxa/pt-7528-16msc-8tx-4gsfp-hv firmware","moxa/pt-7528-16msc-8tx-4gsfp-hv-hv firmware","moxa/pt-7528-16msc-8tx-4gsfp-wv firmware","moxa/pt-7528-16msc-8tx-4gsfp-wv-wv firmware","moxa/pt-7528-16mst-8tx-4gsfp-hv firmware","moxa/pt-7528-16mst-8tx-4gsfp-hv-hv firmware","moxa/pt-7528-16mst-8tx-4gsfp-wv firmware","moxa/pt-7528-16mst-8tx-4gsfp-wv-wv firmware","moxa/pt-7528-20msc-4tx-4gsfp-hv firmware","moxa/pt-7528-20msc-4tx-4gsfp-hv-hv firmware","moxa/pt-7528-20msc-4tx-4gsfp-wv firmware","moxa/pt-7528-20msc-4tx-4gsfp-wv-wv firmware","moxa/pt-7528-20mst-4tx-4gsfp-hv firmware","moxa/pt-7528-20mst-4tx-4gsfp-hv-hv firmware","moxa/pt-7528-20mst-4tx-4gsfp-wv firmware","moxa/pt-7528-20mst-4tx-4gsfp-wv-wv firmware","moxa/pt-7528-8msc-16tx-4gsfp-hv firmware","moxa/pt-7528-8msc-16tx-4gsfp-hv-hv firmware","moxa/pt-7528-8msc-16tx-4gsfp-wv firmware","moxa/pt-7528-8msc-16tx-4gsfp-wv-wv firmware","moxa/pt-7528-8mst-16tx-4gsfp-hv firmware","moxa/pt-7528-8mst-16tx-4gsfp-hv-hv firmware","moxa/pt-7528-8mst-16tx-4gsfp-wv firmware","moxa/pt-7528-8mst-16tx-4gsfp-wv-wv firmware","moxa/pt-7528-8ssc-16tx-4gsfp-hv-hv firmware","moxa/pt-7528-8ssc-16tx-4gsfp-wv-wv firmware","moxa/pt-7828-f-24 firmware","moxa/pt-7828-f-24-24 firmware","moxa/pt-7828-f-24-hv firmware","moxa/pt-7828-f-48 firmware","moxa/pt-7828-f-48-48 firmware","moxa/pt-7828-f-48-hv firmware","moxa/pt-7828-f-hv firmware","moxa/pt-7828-f-hv-hv firmware","moxa/pt-7828-r-24 firmware","moxa/pt-7828-r-24-24 firmware","moxa/pt-7828-r-24-hv firmware","moxa/pt-7828-r-48 firmware","moxa/pt-7828-r-48-48 firmware","moxa/pt-7828-r-48-hv firmware","moxa/pt-7828-r-hv firmware","moxa/pt-7828-r-hv-hv firmware"],"epss":{"score":0.00973,"percentile":0.6179,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.97%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://www.us-cert.gov/ics/advisories/icsa-20-056-03","tags":["Third Party Advisory","US Government Resource"],"source":"ics-cert@hq.dhs.gov"},{"url":"https://www.us-cert.gov/ics/advisories/icsa-20-056-03","tags":["Third Party Advisory","US Government Resource"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-6987","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}