{"cve":{"cve_id":"CVE-2021-31893","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00563,"epss_percentile":0.42345,"epss_as_of":"2026-06-23","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.","published_at":"2021-07-13T11:02:56Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-120"],"nvd_references":["https://cert-portal.siemens.com/productcert/pdf/ssa-641963.pdf"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:15:37.642823Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"simatic-pcs-7-v8.2-and-earlier","product_name":"SIMATIC PCS 7 V8.2 and earlier","version_start":"All versions","version_start_inclusive":true,"version_end":"All versions","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:simatic-pcs-7-v8.2-and-earlier:All versions:All versions"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"simatic-pcs-7-v9.0","product_name":"SIMATIC PCS 7 V9.0","version_start":"All versions < V9.0 SP3","version_start_inclusive":true,"version_end":"All versions < V9.0 SP3","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:simatic-pcs-7-v9.0:All versions < V9.0 SP3:All versions < V9.0 SP3"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"simatic-pdm","product_name":"SIMATIC PDM","version_start":"All versions < V9.2","version_start_inclusive":true,"version_end":"All versions < V9.2","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:simatic-pdm:All versions < V9.2:All versions < V9.2"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"simatic-step-7-v5.x","product_name":"SIMATIC STEP 7 V5.X","version_start":"All versions < V5.6 SP2 HF3","version_start_inclusive":true,"version_end":"All versions < V5.6 SP2 HF3","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:simatic-step-7-v5.x:All versions < V5.6 SP2 HF3:All versions < V5.6 SP2 HF3"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"sinamics-starter-containing-step-7-oem-version","product_name":"SINAMICS STARTER (containing STEP 7 OEM version)","version_start":"All versions < V5.4 HF2","version_start_inclusive":true,"version_end":"All versions < V5.4 HF2","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:sinamics-starter-containing-step-7-oem-version:All versions < V5.4 HF2:All versions < V5.4 HF2"}],"exploit_refs":[],"news":[],"references":[{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-641963.pdf","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2021-07-13T11:02:56Z","label":"CVE published","source":null}]}