{"schemaVersion":3,"id":"CVE-2021-40368","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A vulnerability has been identified in  SIMATIC S7-400 CPU 412-1 DP V7 (All versions),  SIMATIC S7-400 CPU 412-2 DP V7 (All versions),  SIMATIC S7-400 CPU 412-2 PN/DP V7 (All versions < V7.0.3),  SIMATIC S7-400 CPU 414-2 DP V7 (All versions),  SIMATIC S7-400 CPU 414-3 DP V7 (All versions),  SIMATIC S7-400 CPU 414-3 PN/DP V7 (All versions < V7.0.3),  SIMATIC S7-400 CPU 414F-3 PN/DP V7 (All versions < V7.0.3),  SIMATIC S7-400 CPU 416-2 DP V7 (All versions),  SIMATIC S7-400 CPU 416-3 DP V7 (All versions),  SIMATIC S7-400 CPU 416-3 PN/DP V7 (All versions < V7.0.3),  SIMATIC S7-400 CPU 416F-2 DP V7 (All versions),  SIMATIC S7-400 CPU 416F-3 PN/DP V7 (All versions < V7.0.3),  SIMATIC S7-400 CPU 417-4 DP V7 (All versions), SIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants) (All versions < V6.0.10), SIMATIC S7-410 V10 CPU family (incl. SIPLUS variants) (All versions < V10.1), SIMATIC S7-410 V8 CPU family (incl. SIPLUS variants) (All versions < V8.2.3), SIPLUS S7-400 CPU 414-3 PN/DP V7 (All versions < V7.0.3), SIPLUS S7-400 CPU 416-3 PN/DP V7 (All versions < V7.0.3), SIPLUS S7-400 CPU 416-3 V7 (All versions), SIPLUS S7-400 CPU 417-4 V7 (All versions). Affected devices improperly handle specially crafted packets sent to port 102/tcp.\n\nThis could allow an attacker to create a Denial-of-Service condition. A restart is needed to restore normal operations.","dates":{"published":"2022-04-12T09:07:23.000Z","modified":"2025-04-21T13:54:27.056Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":5,"severity":"medium","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.01004,"percentile":0.62361,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.01004},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01004,"percentile":0.62361}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01004,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01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