{"cve":"CVE-2017-9938","nvd":{"published":"2017-08-08T00:29:00.353","modified":"2026-06-17T01:29:14.900","status":"Modified","description":"A vulnerability was discovered in Siemens SIMATIC Logon (All versions before V1.6) that could allow specially crafted packets sent to the SIMATIC Logon Remote Access service on port 16389/tcp to cause a Denial-of-Service condition. The service restarts automatically.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-20","CWE-787"],"references":["http://www.securityfocus.com/bid/99539","https://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-804859.pdf","https://www.tenable.com/security/research/tra-2017-34","http://www.securityfocus.com/bid/99539","https://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-804859.pdf"],"products":["siemens:simatic_logon"],"source":"nvd","synced_at":"2026-10-19T20:44:47.710380879+00:00"},"epss":{"cve":"CVE-2017-9938","score":0.02897,"percentile":0.86936,"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."]}