{"cve":"CVE-2020-25241","nvd":{"published":"2021-03-15T17:15:20.097","modified":"2026-06-17T03:06:38.760","status":"Modified","description":"A vulnerability has been identified in SIMATIC MV400 family (All Versions < V7.0.6). The underlying TCP stack of the affected products does not correctly validate the sequence number for incoming TCP RST packages. An attacker could exploit this to terminate arbitrary TCP sessions.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-129","CWE-1285"],"references":["https://cert-portal.siemens.com/productcert/pdf/ssa-599268.pdf","https://cert-portal.siemens.com/productcert/pdf/ssa-599268.pdf"],"products":["siemens:simatic_mv420_sr-b_body_firmware","siemens:simatic_mv420_sr-b_firmware","siemens:simatic_mv420_sr-p_body_firmware","siemens:simatic_mv420_sr-p_firmware","siemens:simatic_mv440_hr_firmware","siemens:simatic_mv440_sr_firmware","siemens:simatic_mv440_ur_firmware"],"source":"nvd","synced_at":"2026-10-19T21:15:50.279857260+00:00"},"epss":{"cve":"CVE-2020-25241","score":0.01069,"percentile":0.64836,"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."]}