{"id":"CVE-2023-5909","aliases":["EUVD-2023-58182","GHSA-rw69-wr48-w7px"],"status":"published","title":"Improper Validation of Certificate with Host Mismatch in PTC KEPServerEx","description":"KEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00438,"percentile":0.38345,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-295","CWE-297"],"published":"2023-11-30T22:05:59Z","modified":"2026-06-17T06:49:38Z","products":[{"vendor":"ge","product":"industrial_gateway_server"},{"vendor":"ge gigital","product":"industrial gateway server"},{"vendor":"kepware","product":"kepserverex"},{"vendor":"ptc","product":"keepserverex"},{"vendor":"ptc","product":"kepserverex"},{"vendor":"ptc","product":"opc-aggregator"},{"vendor":"ptc","product":"thingworx industrial connectivity"},{"vendor":"ptc","product":"thingworx kepware edge"},{"vendor":"ptc","product":"thingworx kepware server"},{"vendor":"ptc","product":"thingworx_industrial_connectivity"},{"vendor":"ptc","product":"thingworx_kepware_edge"},{"vendor":"ptc","product":"thingworx_kepware_server"},{"vendor":"rockwell automation","product":"kepserver enterprise"},{"vendor":"rockwellautomation","product":"kepserver_enterprise"},{"vendor":"software toolbox","product":"top server"},{"vendor":"softwaretoolbox","product":"top_server"}],"references":[{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-23-334-03","tags":["government-resource","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-5909"},{"url":"https://github.com/advisories/GHSA-rw69-wr48-w7px"}],"sources":{"cve":[{"id":"CVE-2023-5909","title":"Improper Validation of Certificate with Host Mismatch in PTC KEPServerEx","description":"\n\n\n\n\n\n\n\n\nKEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.\n\n\n\n\n\n\n\n","status":"published","published":"2023-11-30T22:05:59.595Z","modified":"2026-02-25T17:20:07.195Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-297"],"updated_at":"2026-11-02T14:35:17.149492Z"}],"euvd":[{"id":"EUVD-2023-58182","description":"\n\n\n\n\n\n\n\n\nKEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.\n\n\n\n\n\n\n\n","status":"published","published":"2023-11-30T22:05:59Z","modified":"2026-02-25T17:20:07Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T19:48:29.128374Z"}],"ghsa":[{"id":"GHSA-rw69-wr48-w7px","title":"\n\n\n\n\n\n\n\n\nKEPServerEX does not properly validate certificates from clients which may allow...","description":"\n\n\n\n\n\n\n\n\nKEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.\n\n\n\n\n\n\n\n","status":"published","published":"2023-12-01T00:31:00Z","modified":"2023-12-06T21:30:58Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-295","CWE-297"],"updated_at":"2026-11-02T14:55:09.149913Z"}],"nvd":[{"id":"CVE-2023-5909","description":"\n\n\n\n\n\n\n\n\nKEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.\n\n\n\n\n\n\n\n","status":"published","published":"2023-11-30T22:15:10.163Z","modified":"2026-06-17T06:49:38.273Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-297","CWE-295"],"updated_at":"2026-11-02T14:08:52.544469Z"}]}}