{"id":"CVE-2019-5166","aliases":["EUVD-2019-14771","GHSA-w4qg-v526-9gvf"],"status":"published","title":"An exploitable stack buffer overflow vulnerability exists in the iocheckd service ‘I/O-Check’...","description":"An exploitable stack buffer overflow vulnerability exists in the iocheckd service ‘I/O-Check’ functionality of WAGO PFC 200 version 03.02.02(14). A specially crafted XML cache file written to a specific location on the device can cause a stack buffer overflow, resulting in code execution. An attacker can send a specially crafted packet to trigger the parsing of this cache file.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00818,"percentile":0.57473,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-120","CWE-787"],"published":"2020-03-10T22:25:42Z","modified":"2026-06-17T02:37:14Z","products":[{"vendor":"wago","product":"pfc200_firmware"},{"vendor":"wago","product":"wago pfc200 firmware"}],"references":[{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2019-0961","tags":["x_refsource_MISC","x_transferred","Exploit","Mitigation","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-5166"},{"url":"https://github.com/advisories/GHSA-w4qg-v526-9gvf"}],"sources":{"cve":[{"id":"CVE-2019-5166","description":"An exploitable stack buffer overflow vulnerability exists in the iocheckd service ‘I/O-Check’ functionality of WAGO PFC 200 version 03.02.02(14). A specially crafted XML cache file written to a specific location on the device can cause a stack buffer overflow, resulting in code execution. An attacker can send a specially crafted packet to trigger the parsing of this cache file.","status":"published","published":"2020-03-10T22:25:42Z","modified":"2024-08-04T19:47:56.751Z","updated_at":"2026-11-02T14:20:18.746972Z"}],"euvd":[{"id":"EUVD-2019-14771","description":"An exploitable stack buffer overflow vulnerability exists in the iocheckd service ‘I/O-Check’ functionality of WAGO PFC 200 version 03.02.02(14). A specially crafted XML cache file written to a specific location on the device can cause a stack buffer overflow, resulting in code execution. An attacker can send a specially crafted packet to trigger the parsing of this cache file.","status":"published","published":"2020-03-10T22:25:42Z","modified":"2024-08-04T19:47:56Z","updated_at":"2026-11-03T03:06:53.453369Z"}],"ghsa":[{"id":"GHSA-w4qg-v526-9gvf","title":"An exploitable stack buffer overflow vulnerability exists in the iocheckd service ‘I/O-Check’...","description":"An exploitable stack buffer overflow vulnerability exists in the iocheckd service ‘I/O-Check’ functionality of WAGO PFC 200 version 03.02.02(14). A specially crafted XML cache file written to a specific location on the device can cause a stack buffer overflow, resulting in code execution. An attacker can send a specially crafted packet to trigger the parsing of this cache file.","status":"published","published":"2022-05-24T22:29:01Z","modified":"2023-01-30T05:06:13Z","cwes":["CWE-120"],"updated_at":"2026-11-02T14:47:27.248528Z"}],"nvd":[{"id":"CVE-2019-5166","description":"An exploitable stack buffer overflow vulnerability exists in the iocheckd service ‘I/O-Check’ functionality of WAGO PFC 200 version 03.02.02(14). A specially crafted XML cache file written to a specific location on the device can cause a stack buffer overflow, resulting in code execution. An attacker can send a specially crafted packet to trigger the parsing of this cache file.","status":"published","published":"2020-03-11T22:27:41.3Z","modified":"2026-06-17T02:37:14.86Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":4.6,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:05:45.254119Z"}]}}