{"id":"CVE-2021-31893","aliases":["EUVD-2021-18768","GHSA-47m5-c425-v4ww"],"status":"published","title":"A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS...","description":"A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS 7 V9.0 (All versions \u003c V9.0 SP3), SIMATIC PDM (All versions \u003c V9.2), SIMATIC STEP 7 V5.X (All versions \u003c V5.6 SP2 HF3), SINAMICS STARTER (containing STEP 7 OEM version) (All versions \u003c 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.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00563,"percentile":0.47293,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-120"],"published":"2021-07-13T11:02:56Z","modified":"2026-06-17T03:52:26Z","products":[{"vendor":"siemens","product":"simatic pcs 7 v8.2 and earlier"},{"vendor":"siemens","product":"simatic pcs 7 v9.0"},{"vendor":"siemens","product":"simatic pdm"},{"vendor":"siemens","product":"simatic step 7 v5.x"},{"vendor":"siemens","product":"simatic_pcs_firmware"},{"vendor":"siemens","product":"simatic_pdm_firmware"},{"vendor":"siemens","product":"simatic_step_7_firmware"},{"vendor":"siemens","product":"sinamics starter (containing step 7 oem version)"},{"vendor":"siemens","product":"sinamics_starter_firmware"}],"references":[{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-641963.pdf","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31893"},{"url":"https://github.com/advisories/GHSA-47m5-c425-v4ww"}],"sources":{"cve":[{"id":"CVE-2021-31893","description":"A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS 7 V9.0 (All versions \u003c V9.0 SP3), SIMATIC PDM (All versions \u003c V9.2), SIMATIC STEP 7 V5.X (All versions \u003c V5.6 SP2 HF3), SINAMICS STARTER (containing STEP 7 OEM version) (All versions \u003c 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.","status":"published","published":"2021-07-13T11:02:56Z","modified":"2024-08-03T23:10:30.646Z","cwes":["CWE-120"],"updated_at":"2026-11-02T14:33:05.665371Z"}],"euvd":[{"id":"EUVD-2021-18768","description":"A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS 7 V9.0 (All versions \u003c V9.0 SP3), SIMATIC PDM (All versions \u003c V9.2), SIMATIC STEP 7 V5.X (All versions \u003c V5.6 SP2 HF3), SINAMICS STARTER (containing STEP 7 OEM version) (All versions \u003c 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.","status":"published","published":"2021-07-13T11:02:56Z","modified":"2024-08-03T23:10:30Z","updated_at":"2026-11-03T03:24:37.97373Z"}],"ghsa":[{"id":"GHSA-47m5-c425-v4ww","title":"A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS...","description":"A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS 7 V9.0 (All versions \u003c V9.0 SP3), SIMATIC PDM (All versions \u003c V9.2), SIMATIC STEP 7 V5.X (All versions \u003c V5.6 SP2 HF3), SINAMICS STARTER (containing STEP 7 OEM version) (All versions \u003c 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.","status":"published","published":"2022-05-24T19:07:44Z","modified":"2023-01-30T05:00:42Z","cwes":["CWE-120"],"updated_at":"2026-11-02T14:46:15.885384Z"}],"nvd":[{"id":"CVE-2021-31893","description":"A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS 7 V9.0 (All versions \u003c V9.0 SP3), SIMATIC PDM (All versions \u003c V9.2), SIMATIC STEP 7 V5.X (All versions \u003c V5.6 SP2 HF3), SINAMICS STARTER (containing STEP 7 OEM version) (All versions \u003c 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.","status":"published","published":"2021-07-13T11:15:09.527Z","modified":"2026-06-17T03:52:26.483Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:06:55.747384Z"}]}}