{"id":"CVE-2023-3825","aliases":["EUVD-2023-44453","GHSA-m3jq-gg7x-47cq"],"status":"published","title":"PTC’s KEPServerEX Versions 6.0 to 6.14.263 are vulnerable to being made to read a recursively...","description":"PTC’s KEPServerEX Versions 6.0 to 6.14.263 are vulnerable to being made to read a recursively defined object that leads to uncontrolled resource consumption. KEPServerEX uses OPC UA, a protocol which defines various object types that can be nested to create complex arrays. It does not implement a check to see if such an object is recursively defined, so an attack could send a maliciously created message that the decoder would try to decode until the stack overflowed and the device crashed.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00757,"percentile":0.55501,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400","CWE-787"],"published":"2023-07-31T22:53:56Z","modified":"2026-06-17T06:14:56Z","products":[{"vendor":"kepware","product":"kepserverex"},{"vendor":"ptc","product":"kepserverex"}],"references":[{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-23-208-02","tags":["government-resource","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-3825"},{"url":"https://github.com/advisories/GHSA-m3jq-gg7x-47cq"}],"sources":{"cve":[{"id":"CVE-2023-3825","description":"\nPTC’s KEPServerEX Versions 6.0 to 6.14.263 are vulnerable to being made to read a recursively defined object that leads to uncontrolled resource consumption. KEPServerEX uses OPC UA, a protocol which defines various object types that can be nested to create complex arrays. It does not implement a check to see if such an object is recursively defined, so an attack could send a maliciously created message that the decoder would try to decode until the stack overflowed and the device crashed.\n\n","status":"published","published":"2023-07-31T22:53:56.568Z","modified":"2024-10-21T18:15:51.966Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:35:24.707957Z"}],"euvd":[{"id":"EUVD-2023-44453","description":"\nPTC’s KEPServerEX Versions 6.0 to 6.14.263 are vulnerable to being made to read a recursively defined object that leads to uncontrolled resource consumption. KEPServerEX uses OPC UA, a protocol which defines various object types that can be nested to create complex arrays. It does not implement a check to see if such an object is recursively defined, so an attack could send a maliciously created message that the decoder would try to decode until the stack overflowed and the device crashed.\n\n","status":"published","published":"2023-07-31T22:53:56Z","modified":"2024-10-21T18:15:51Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T00:05:23.140259Z"}],"ghsa":[{"id":"GHSA-m3jq-gg7x-47cq","title":"\nPTC’s KEPServerEX Versions 6.0 to 6.14.263 are vulnerable to being made to read a recursively...","description":"\nPTC’s KEPServerEX Versions 6.0 to 6.14.263 are vulnerable to being made to read a recursively defined object that leads to uncontrolled resource consumption. KEPServerEX uses OPC UA, a protocol which defines various object types that can be nested to create complex arrays. It does not implement a check to see if such an object is recursively defined, so an attack could send a maliciously created message that the decoder would try to decode until the stack overflowed and the device crashed.\n\n","status":"published","published":"2023-08-01T00:30:17Z","modified":"2024-04-04T06:27:52Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400","CWE-787"],"updated_at":"2026-11-02T14:56:42.669106Z"}],"nvd":[{"id":"CVE-2023-3825","description":"\nPTC’s KEPServerEX Versions 6.0 to 6.14.263 are vulnerable to being made to read a recursively defined object that leads to uncontrolled resource consumption. KEPServerEX uses OPC UA, a protocol which defines various object types that can be nested to create complex arrays. It does not implement a check to see if such an object is recursively defined, so an attack could send a maliciously created message that the decoder would try to decode until the stack overflowed and the device crashed.\n\n","status":"published","published":"2023-07-31T23:15:10.437Z","modified":"2026-06-17T06:14:56.253Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","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:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-400","CWE-787"],"updated_at":"2026-11-02T14:08:18.687088Z"}]}}