{"schemaVersion":3,"id":"CVE-2021-25667","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A vulnerability has been identified in RUGGEDCOM RM1224 (All versions >= V4.3 and < V6.4), SCALANCE M-800 (All versions >= V4.3 and < V6.4), SCALANCE S615 (All versions >= V4.3 and < V6.4), SCALANCE SC-600 Family (All versions >= V2.0 and < V2.1.3), SCALANCE XB-200 (All versions < V4.1), SCALANCE XC-200 (All versions < V4.1), SCALANCE XF-200BA (All versions < V4.1), SCALANCE XM400 (All versions < V6.2), SCALANCE XP-200 (All versions < V4.1), SCALANCE XR-300WG (All versions < V4.1), SCALANCE XR500 (All versions < V6.2). Affected devices contain a stack-based buffer overflow vulnerability in the handling of STP BPDU frames that could allow a remote attacker to trigger a denial-of-service condition or potentially remote code execution. Successful exploitation requires the passive listening feature of the device to be active.","dates":{"published":"2021-03-15T17:03:31.000Z","modified":"2026-06-02T19:24:47.966Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.8,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":8.8,"severity":"high","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":5.8,"severity":"medium","vector":"AV:A/AC:L/Au:N/C:P/I:P/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00953,"percentile":0.60707,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0.09399999999999999,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00859},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00953,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00953,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00953,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00953,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00953,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00953,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00953,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00953,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00953,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00953,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00953,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00953,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00953,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00953,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00953,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00953,"percentile":0.60707}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00859,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00953,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00953,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00953,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00953,"percentil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