{"cve":"CVE-2021-40365","nvd":{"published":"2022-12-13T16:15:14.650","modified":"2026-06-17T04:06:48.187","status":"Modified","description":"Affected devices don't process correctly certain special crafted packets sent to port 102/tcp, which could allow an attacker to cause a denial of service in the device.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-20"],"references":["https://cert-portal.siemens.com/productcert/pdf/ssa-382653.pdf","https://cert-portal.siemens.com/productcert/pdf/ssa-382653.pdf"],"products":["siemens:simatic_et_200_sp_open_controller_cpu_1515sp_pc_firmware","siemens:simatic_s7-1200_cpu_1211c_firmware","siemens:simatic_s7-1200_cpu_1212c_firmware","siemens:simatic_s7-1200_cpu_1212fc_firmware","siemens:simatic_s7-1200_cpu_1214_fc_firmware","siemens:simatic_s7-1200_cpu_1214c_firmware","siemens:simatic_s7-1200_cpu_1214fc_firmware","siemens:simatic_s7-1200_cpu_1215_fc_firmware","siemens:simatic_s7-1200_cpu_1215c_firmware","siemens:simatic_s7-1200_cpu_1215fc_firmware","siemens:simatic_s7-1200_cpu_1217c_firmware","siemens:simatic_s7-1200_cpu_12_1211c_firmware","siemens:simatic_s7-1200_cpu_12_1212c_firmware","siemens:simatic_s7-1200_cpu_12_1212fc_firmware","siemens:simatic_s7-1200_cpu_12_1214c_firmware","siemens:simatic_s7-1200_cpu_12_1214fc_firmware","siemens:simatic_s7-1200_cpu_12_1215c_firmware","siemens:simatic_s7-1200_cpu_12_1215fc_firmware","siemens:simatic_s7-1200_cpu_12_1217c_firmware","siemens:simatic_s7-1500_cpu_1507s_f_firmware","siemens:simatic_s7-1500_cpu_1507s_firmware","siemens:simatic_s7-1500_cpu_1508s_f_firmware","siemens:simatic_s7-1500_cpu_1508s_firmware","siemens:simatic_s7-1500_cpu_1510sp-1_firmware","siemens:simatic_s7-1500_cpu_1510sp_firmware","siemens:simatic_s7-1500_cpu_1511-1_firmware","siemens:simatic_s7-1500_cpu_1511-1_pn_firmware","siemens:simatic_s7-1500_cpu_1511c-1_firmware","siemens:simatic_s7-1500_cpu_1511c_firmware","siemens:simatic_s7-1500_cpu_1511f-1_firmware","siemens:simatic_s7-1500_cpu_1511f-1_pn_firmware","siemens:simatic_s7-1500_cpu_1511t-1_firmware","siemens:simatic_s7-1500_cpu_1511tf-1_firmware","siemens:simatic_s7-1500_cpu_1512c-1_firmware","siemens:simatic_s7-1500_cpu_1512c_firmware","siemens:simatic_s7-1500_cpu_1512sp-1_firmware","siemens:simatic_s7-1500_cpu_1512spf-1_firmware","siemens:simatic_s7-1500_cpu_1513-1_firmware","siemens:simatic_s7-1500_cpu_1513-1_pn_firmware","siemens:simatic_s7-1500_cpu_1513f-1_firmware","siemens:simatic_s7-1500_cpu_1513f-1_pn_firmware","siemens:simatic_s7-1500_cpu_1513r-1_firmware","siemens:simatic_s7-1500_cpu_1515-2_firmware","siemens:simatic_s7-1500_cpu_1515-2_pn_firmware","siemens:simatic_s7-1500_cpu_151511c-1_firmware","siemens:simatic_s7-1500_cpu_151511f-1_firmware","siemens:simatic_s7-1500_cpu_1515f-2_firmware","siemens:simatic_s7-1500_cpu_1515f-2_pn_firmware","siemens:simatic_s7-1500_cpu_1515r-2_firmware","siemens:simatic_s7-1500_cpu_1515t-2_firmware"],"source":"nvd","synced_at":"2026-10-19T21:37:28.463369388+00:00"},"epss":{"cve":"CVE-2021-40365","score":0.00929,"percentile":0.60574,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}