{"cve":"CVE-2023-28831","nvd":{"published":"2023-09-12T10:15:27.230","modified":"2026-06-17T05:48:51.753","status":"Modified","description":"The OPC UA implementations (ANSI C and C++) in affected products contain an integer overflow vulnerability that could cause the application to run into an infinite loop during certificate validation.\r\n\r\nThis could allow an unauthenticated remote attacker to create a denial of service condition by sending a specially crafted certificate.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.7},"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-190"],"references":["https://cert-portal.siemens.com/productcert/html/ssa-118850.html","https://cert-portal.siemens.com/productcert/html/ssa-711309.html","https://cert-portal.siemens.com/productcert/pdf/ssa-118850.pdf","https://cert-portal.siemens.com/productcert/pdf/ssa-711309.pdf","https://cert-portal.siemens.com/productcert/html/ssa-118850.html"],"products":["siemens:simatic_cloud_connect_7_cc712_firmware","siemens:simatic_cloud_connect_7_cc716_firmware","siemens:simatic_drive_controller_cpu_1504d_tf_firmware","siemens:simatic_drive_controller_cpu_1507d_tf_firmware","siemens:simatic_et_200sp_open_controller_cpu_firmware","siemens:simatic_s7-1200_cpu_firmware","siemens:simatic_s7-1500_cpu_1510sp-1_pn_firmware","siemens:simatic_s7-1500_cpu_1510sp_f-1_pn_firmware","siemens:simatic_s7-1500_cpu_1511-1_pn_firmware","siemens:simatic_s7-1500_cpu_1511c-1_pn_firmware","siemens:simatic_s7-1500_cpu_1511f-1_pn_firmware","siemens:simatic_s7-1500_cpu_1511t-1_pn_firmware","siemens:simatic_s7-1500_cpu_1511tf-1_pn_firmware","siemens:simatic_s7-1500_cpu_1512c-1_pn_firmware","siemens:simatic_s7-1500_cpu_1512sp-1_pn_firmware","siemens:simatic_s7-1500_cpu_1512sp_f-1_pn_firmware","siemens:simatic_s7-1500_cpu_1513-1_pn_firmware","siemens:simatic_s7-1500_cpu_1513f-1_pn_firmware","siemens:simatic_s7-1500_cpu_1513r-1_pn_firmware","siemens:simatic_s7-1500_cpu_1514sp-2_pn_firmware","siemens:simatic_s7-1500_cpu_1514sp_f-2_pn_firmware","siemens:simatic_s7-1500_cpu_1514spt-2_pn_firmware","siemens:simatic_s7-1500_cpu_1514spt_f-2_pn_firmware","siemens:simatic_s7-1500_cpu_1515-2_pn_firmware","siemens:simatic_s7-1500_cpu_1515f-2_pn_firmware","siemens:simatic_s7-1500_cpu_1515r-2_pn_firmware","siemens:simatic_s7-1500_cpu_1515t-2_pn_firmware","siemens:simatic_s7-1500_cpu_1515tf-2_pn_firmware","siemens:simatic_s7-1500_cpu_1516-3_pn\\/dp_firmware","siemens:simatic_s7-1500_cpu_1516f-3_pn\\/dp_firmware","siemens:simatic_s7-1500_cpu_1516t-3_pn\\/dp_firmware","siemens:simatic_s7-1500_cpu_1516tf-3_pn\\/dp_firmware","siemens:simatic_s7-1500_cpu_1517-3_pn\\/dp_firmware","siemens:simatic_s7-1500_cpu_1517f-3_pn\\/dp_firmware","siemens:simatic_s7-1500_cpu_1517h-3_pn_firmware","siemens:simatic_s7-1500_cpu_1517t-3_pn\\/dp_firmware","siemens:simatic_s7-1500_cpu_1517tf-3_pn\\/dp_firmware","siemens:simatic_s7-1500_cpu_1518-4_pn\\/dp_firmware","siemens:simatic_s7-1500_cpu_1518-4_pn\\/dp_mfp_firmware","siemens:simatic_s7-1500_cpu_1518f-4_pn\\/dp_firmware","siemens:simatic_s7-1500_cpu_1518f-4_pn\\/dp_mfp_firmware","siemens:simatic_s7-1500_cpu_1518hf-4_pn_firmware","siemens:simatic_s7-1500_cpu_1518t-4_pn\\/dp_firmware","siemens:simatic_s7-1500_cpu_1518tf-4_pn\\/dp_firmware","siemens:simatic_s7-1500_cpu_s7-1518-4_pn\\/dp_odk_firmware","siemens:simatic_s7-1500_cpu_s7-1518f-4_pn\\/dp_odk_firmware","siemens:simatic_s7-1500_et_200pro_firmware","siemens:simatic_s7-1500_software_controller_firmware","siemens:simatic_s7-plcsim_advanced_firmware","siemens:siplus_et_200sp_cpu_1510sp-1_pn_firmware"],"source":"nvd","synced_at":"2026-10-19T21:39:24.235896374+00:00"},"epss":{"cve":"CVE-2023-28831","score":0.01129,"percentile":0.6639,"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."]}