{"schemaVersion":3,"id":"CVE-2021-31893","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS 7 V9.0 (All versions < V9.0 SP3), SIMATIC PDM (All versions < V9.2), SIMATIC STEP 7 V5.X (All versions < V5.6 SP2 HF3), SINAMICS STARTER (containing STEP 7 OEM version) (All versions < V5.4 HF2). The affected software contains a buffer overflow vulnerability while handling certain files that could allow a local attacker to trigger a denial-of-service condition or potentially lead to remote code execution.","dates":{"published":"2021-07-13T11:02:56.000Z","modified":"2024-08-03T23:10:30.646Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.8,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.8,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:L/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":7.2,"severity":"high","vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00563,"percentile":0.45688,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00563},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00563,"percentile":0.45688}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00563,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00563,"percentile":null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