{"id":"CVE-2021-45918","aliases":["EUVD-2021-32633","GHSA-qhhp-8cc7-vf7w"],"status":"published","title":"NHI’s health insurance web service component – Heap-based Buffer Overflow","description":"NHI’s health insurance web service component has insufficient validation for input string length, which can result in heap-based buffer overflow attack. A remote attacker can exploit this vulnerability to flood the memory space reserved for the program, in order to terminate service without authentication, which requires a system restart to recover service.","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":0.01561,"percentile":0.75453,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122","CWE-1284","CWE-787"],"published":"2022-06-20T05:30:26Z","modified":"2026-06-17T04:14:15Z","products":[{"vendor":"nhi","product":"health insurance web service component"},{"vendor":"nhi","product":"health_insurance_web_service_component"}],"references":[{"url":"https://www.twcert.org.tw/tw/cp-132-6227-eaf49-1.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-45918"},{"url":"https://github.com/advisories/GHSA-qhhp-8cc7-vf7w"}],"sources":{"cve":[{"id":"CVE-2021-45918","title":"NHI’s health insurance web service component – Heap-based Buffer Overflow","description":"NHI’s health insurance web service component has insufficient validation for input string length, which can result in heap-based buffer overflow attack. A remote attacker can exploit this vulnerability to flood the memory space reserved for the program, in order to terminate service without authentication, which requires a system restart to recover service.","status":"published","published":"2022-06-20T05:30:26.758Z","modified":"2024-09-17T04:04:01.665Z","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-122"],"updated_at":"2026-11-02T14:33:02.20241Z"}],"euvd":[{"id":"EUVD-2021-32633","description":"NHI’s health insurance web service component has insufficient validation for input string length, which can result in heap-based buffer overflow attack. A remote attacker can exploit this vulnerability to flood the memory space reserved for the program, in order to terminate service without authentication, which requires a system restart to recover service.","status":"published","published":"2022-06-20T05:30:26Z","modified":"2024-09-17T04:04:01Z","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":"2026-11-03T00:28:26.623918Z"}],"ghsa":[{"id":"GHSA-qhhp-8cc7-vf7w","title":"NHI’s health insurance web service component has insufficient validation for input string length,...","description":"NHI’s health insurance web service component has insufficient validation for input string length, which can result in heap-based buffer overflow attack. A remote attacker can exploit this vulnerability to flood the memory space reserved for the program, in order to terminate service without authentication, which requires a system restart to recover service.","status":"published","published":"2022-06-21T00:00:48Z","modified":"2023-06-27T23:07:45Z","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-122","CWE-787","CWE-1284"],"updated_at":"2026-11-02T14:54:39.385813Z"}],"nvd":[{"id":"CVE-2021-45918","description":"NHI’s health insurance web service component has insufficient validation for input string length, which can result in heap-based buffer overflow attack. A remote attacker can exploit this vulnerability to flood the memory space reserved for the program, in order to terminate service without authentication, which requires a system restart to recover service.","status":"published","published":"2022-06-20T06:15:08.503Z","modified":"2026-06-17T04:14:15.27Z","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"},{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-122","CWE-1284"],"updated_at":"2026-11-02T14:07:06.501652Z"}]}}