{"id":"CVE-2022-43501","aliases":["EUVD-2022-46499","GHSA-96qq-9h7m-67pw"],"status":"published","title":"KASAGO TCP/IP stack provided by Zuken Elmic generates ISNs(Initial Sequence Number) for TCP...","description":"KASAGO TCP/IP stack provided by Zuken Elmic generates ISNs(Initial Sequence Number) for TCP connections from an insufficiently random source. An attacker may be able to determine the ISN of the current or future TCP connections and either hijack existing ones or spoof future ones.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00565,"percentile":0.47439,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-330"],"published":"2023-02-10T00:00:00Z","modified":"2026-06-17T05:06:40Z","products":[{"vendor":"elwsc","product":"kasago_ipv4"},{"vendor":"elwsc","product":"kasago_ipv4_light"},{"vendor":"elwsc","product":"kasago_ipv6\\/v4_dual"},{"vendor":"elwsc","product":"kasago_mobile_ipv6"},{"vendor":"zuken elmic","product":"kasago ipv4"},{"vendor":"zuken elmic","product":"kasago ipv4 light"},{"vendor":"zuken elmic","product":"kasago ipv6/v4 dual"},{"vendor":"zuken elmic","product":"kasago mobile ipv6"}],"references":[{"url":"https://www.elwsc.co.jp/news/6352","tags":["x_transferred","Vendor Advisory"]},{"url":"https://jvn.jp/en/vu/JVNVU99551468/","tags":["third-party-advisory","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-43501"},{"url":"https://jvn.jp/en/vu/JVNVU99551468"},{"url":"https://github.com/advisories/GHSA-96qq-9h7m-67pw"}],"sources":{"cve":[{"id":"CVE-2022-43501","description":"KASAGO TCP/IP stack provided by Zuken Elmic generates ISNs(Initial Sequence Number) for TCP connections from an insufficiently random source. An attacker may be able to determine the ISN of the current or future TCP connections and either hijack existing ones or spoof future ones.","status":"published","published":"2023-02-10T00:00:00Z","modified":"2025-03-24T18:11:03.974Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"adp"}],"cwes":["CWE-330"],"updated_at":"2026-11-02T14:34:25.618175Z"}],"euvd":[{"id":"EUVD-2022-46499","description":"KASAGO TCP/IP stack provided by Zuken Elmic generates ISNs(Initial Sequence Number) for TCP connections from an insufficiently random source. An attacker may be able to determine the ISN of the current or future TCP connections and either hijack existing ones or spoof future ones.","status":"published","published":"2023-02-10T00:00:00Z","modified":"2025-03-24T18:11:03Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T20:52:54.592858Z"}],"ghsa":[{"id":"GHSA-96qq-9h7m-67pw","title":"KASAGO TCP/IP stack provided by Zuken Elmic generates ISNs(Initial Sequence Number) for TCP...","description":"KASAGO TCP/IP stack provided by Zuken Elmic generates ISNs(Initial Sequence Number) for TCP connections from an insufficiently random source. An attacker may be able to determine the ISN of the current or future TCP connections and either hijack existing ones or spoof future ones.","status":"published","published":"2023-02-10T06:30:42Z","modified":"2025-03-24T18:31:40Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-330"],"updated_at":"2026-11-02T15:00:25.317617Z"}],"nvd":[{"id":"CVE-2022-43501","description":"KASAGO TCP/IP stack provided by Zuken Elmic generates ISNs(Initial Sequence Number) for TCP connections from an insufficiently random source. An attacker may be able to determine the ISN of the current or future TCP connections and either hijack existing ones or spoof future ones.","status":"published","published":"2023-02-10T04:15:11.107Z","modified":"2026-06-17T05:06:40.76Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"primary"},{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"secondary"}],"cwes":["CWE-330"],"updated_at":"2026-11-02T14:07:36.026349Z"}]}}