{"cve":"CVE-2020-6989","nvd":{"published":"2020-03-24T19:15:21.400","modified":"2026-06-17T03:24:04.620","status":"Modified","description":"In Moxa PT-7528 series firmware, Version 4.0 or lower, and PT-7828 series firmware, Version 3.9 or lower, a buffer overflow in the web server allows remote attackers to cause a denial-of-service condition or execute arbitrary code.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-787","CWE-121"],"references":["https://www.us-cert.gov/ics/advisories/icsa-20-056-03","https://www.us-cert.gov/ics/advisories/icsa-20-056-03"],"products":["moxa:pt-7528-12msc-12tx-4gsfp-hv-hv_firmware","moxa:pt-7528-12msc-12tx-4gsfp-hv_firmware","moxa:pt-7528-12msc-12tx-4gsfp-wv-wv_firmware","moxa:pt-7528-12msc-12tx-4gsfp-wv_firmware","moxa:pt-7528-12mst-12tx-4gsfp-hv-hv_firmware","moxa:pt-7528-12mst-12tx-4gsfp-hv_firmware","moxa:pt-7528-12mst-12tx-4gsfp-wv-wv_firmware","moxa:pt-7528-12mst-12tx-4gsfp-wv_firmware","moxa:pt-7528-16msc-8tx-4gsfp-hv-hv_firmware","moxa:pt-7528-16msc-8tx-4gsfp-hv_firmware","moxa:pt-7528-16msc-8tx-4gsfp-wv-wv_firmware","moxa:pt-7528-16msc-8tx-4gsfp-wv_firmware","moxa:pt-7528-16mst-8tx-4gsfp-hv-hv_firmware","moxa:pt-7528-16mst-8tx-4gsfp-hv_firmware","moxa:pt-7528-16mst-8tx-4gsfp-wv-wv_firmware","moxa:pt-7528-16mst-8tx-4gsfp-wv_firmware","moxa:pt-7528-20msc-4tx-4gsfp-hv-hv_firmware","moxa:pt-7528-20msc-4tx-4gsfp-hv_firmware","moxa:pt-7528-20msc-4tx-4gsfp-wv-wv_firmware","moxa:pt-7528-20msc-4tx-4gsfp-wv_firmware","moxa:pt-7528-20mst-4tx-4gsfp-hv-hv_firmware","moxa:pt-7528-20mst-4tx-4gsfp-hv_firmware","moxa:pt-7528-20mst-4tx-4gsfp-wv-wv_firmware","moxa:pt-7528-20mst-4tx-4gsfp-wv_firmware","moxa:pt-7528-24tx-hv-hv_firmware","moxa:pt-7528-24tx-hv_firmware","moxa:pt-7528-24tx-wv-hv_firmware","moxa:pt-7528-24tx-wv-wv_firmware","moxa:pt-7528-24tx-wv_firmware","moxa:pt-7528-8msc-16tx-4gsfp-hv-hv_firmware","moxa:pt-7528-8msc-16tx-4gsfp-hv_firmware","moxa:pt-7528-8msc-16tx-4gsfp-wv-wv_firmware","moxa:pt-7528-8msc-16tx-4gsfp-wv_firmware","moxa:pt-7528-8mst-16tx-4gsfp-hv-hv_firmware","moxa:pt-7528-8mst-16tx-4gsfp-hv_firmware","moxa:pt-7528-8mst-16tx-4gsfp-wv-wv_firmware","moxa:pt-7528-8mst-16tx-4gsfp-wv_firmware","moxa:pt-7528-8ssc-16tx-4gsfp-hv-hv_firmware","moxa:pt-7528-8ssc-16tx-4gsfp-wv-wv_firmware","moxa:pt-7828-f-24-24_firmware","moxa:pt-7828-f-24-hv_firmware","moxa:pt-7828-f-24_firmware","moxa:pt-7828-f-48-48_firmware","moxa:pt-7828-f-48-hv_firmware","moxa:pt-7828-f-48_firmware","moxa:pt-7828-f-hv-hv_firmware","moxa:pt-7828-f-hv_firmware","moxa:pt-7828-r-24-24_firmware","moxa:pt-7828-r-24-hv_firmware","moxa:pt-7828-r-24_firmware"],"source":"nvd","synced_at":"2026-10-19T21:03:08.679916934+00:00"},"epss":{"cve":"CVE-2020-6989","score":0.03498,"percentile":0.89159,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}