{"cve":"CVE-2020-28397","nvd":{"published":"2021-08-10T11:15:07.423","modified":"2026-06-17T03:10:22.840","status":"Modified","description":"A vulnerability has been identified in SIMATIC Drive Controller family (All versions < V2.9.2), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions < V21.9), SIMATIC S7 PLCSIM Advanced (All versions > V2 < V4), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (Version V4.4), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions > V2.5 < V2.9.2), SIMATIC S7-1500 Software Controller (All versions > V2.5 < V21.9), TIM 1531 IRC (incl. SIPLUS NET variants) (Version V2.1). Due to an incorrect authorization check in the affected component, an attacker could extract information about access protected PLC program variables over port 102/tcp from an affected device when reading multiple attributes at once.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":["CWE-863"],"references":["https://cert-portal.siemens.com/productcert/pdf/ssa-865327.pdf","https://cert-portal.siemens.com/productcert/pdf/ssa-865327.pdf"],"products":["siemens:cpu1510sp_f-1_firmware","siemens:cpu_1211c_firmware","siemens:cpu_1212c_firmware","siemens:cpu_1212fc_firmware","siemens:cpu_1214c_firmware","siemens:cpu_1214fc_firmware","siemens:cpu_1215c_firmware","siemens:cpu_1215fc_firmware","siemens:cpu_1217c_firmware","siemens:cpu_1504d_tf_firmware","siemens:cpu_1507d_tf_firmware","siemens:cpu_1510sp-1pn_firmware","siemens:cpu_1511-1pn_firmware","siemens:cpu_1511c-1_pn_firmware","siemens:cpu_1511f-1pn_firmware","siemens:cpu_1511t-1pn_firmware","siemens:cpu_1511tf-1pn_firmware","siemens:cpu_1512c-1_pn_firmware","siemens:cpu_1512sp-1_pn_firmware","siemens:cpu_1512sp_f-1_pn_firmware","siemens:cpu_1513-1_pn_firmware","siemens:cpu_1513f-1_pn_firmware","siemens:cpu_1513pro_f-2_pn_firmware","siemens:cpu_1513r-1_pn_firmware","siemens:cpu_1515-2_firmware","siemens:cpu_1515f-2_firmware","siemens:cpu_1515r-2_pn_firmware","siemens:cpu_1515sp_pc2_tf_firmware","siemens:cpu_1515t-2_pn_firmware","siemens:cpu_1515tf-2_pn_firmware","siemens:cpu_1516-3_firmware","siemens:cpu_1516f-3_firmware","siemens:cpu_1516pro-2_pn_firmware","siemens:cpu_1516pro_f-2_pn_firmware","siemens:cpu_1516t-3_pn\\/dp_firmware","siemens:cpu_1516tf-3_pn\\/dp_firmware","siemens:cpu_1517-3_pn\\/dp_firmware","siemens:cpu_1517f-3_pn\\/dp_firmware","siemens:cpu_1517t-3_pn\\/dp_firmware","siemens:cpu_1517tf-3_pn\\/dp_firmware","siemens:cpu_1518-4_pn\\/dp_firmware","siemens:cpu_1518f-4_pn\\/dp_firmware","siemens:simatic_s7-1500_software_controller","siemens:simatic_s7_plcsim_advanced_firmware","siemens:siplus_cpu-1516f-3_pn\\/dp_firmware","siemens:siplus_cpu_1510sp_f-1pn_firmware","siemens:siplus_cpu_1511-1_pn_firmware","siemens:siplus_cpu_1511f-1_pn_firmware","siemens:siplus_cpu_1512sp-1_pn_firmware","siemens:siplus_cpu_1512sp_f-1pn_firmware"],"source":"nvd","synced_at":"2026-10-19T21:21:13.713336758+00:00"},"epss":{"cve":"CVE-2020-28397","score":0.00752,"percentile":0.55033,"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."]}