{"id":"CVE-2025-23018","aliases":["EUVD-2025-3076","GHSA-mf23-wm84-g9x3"],"status":"published","title":"IPv4-in-IPv6 and IPv6-in-IPv6 tunneling (RFC 2473) do not require the validation or verification...","description":"IPv4-in-IPv6 and IPv6-in-IPv6 tunneling (RFC 2473) do not require the validation or verification of the source of a network packet, allowing an attacker to spoof and route arbitrary traffic via an exposed network interface. This is a similar issue to CVE-2020-10136.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01025,"percentile":0.64011,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-940"],"published":"2025-01-14T00:00:00Z","modified":"2026-06-17T08:51:28Z","products":[{"vendor":"ietf","product":"ipv6"}],"references":[{"url":"https://datatracker.ietf.org/doc/html/rfc2473","tags":["Technical Description"]},{"url":"https://papers.mathyvanhoef.com/usenix2025-tunnels.pdf","tags":["Technical Description"]},{"url":"https://www.top10vpn.com/research/tunneling-protocol-vulnerability/","tags":["Technical Description"]},{"url":"https://www.kb.cert.org/vuls/id/199397"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-23018"},{"url":"https://www.top10vpn.com/research/tunneling-protocol-vulnerability"},{"url":"https://github.com/advisories/GHSA-mf23-wm84-g9x3"}],"sources":{"cve":[{"id":"CVE-2025-23018","description":"IPv4-in-IPv6 and IPv6-in-IPv6 tunneling (RFC 2473) do not require the validation or verification of the source of a network packet, allowing an attacker to spoof and route arbitrary traffic via an exposed network interface. This is a similar issue to CVE-2020-10136.","status":"published","published":"2025-01-14T00:00:00Z","modified":"2025-11-03T21:00:13.443Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-940"],"updated_at":"2026-11-02T14:32:33.410838Z"}],"euvd":[{"id":"EUVD-2025-3076","description":"IPv4-in-IPv6 and IPv6-in-IPv6 tunneling (RFC 2473) do not require the validation or verification of the source of a network packet, allowing an attacker to spoof and route arbitrary traffic via an exposed network interface. This is a similar issue to CVE-2020-10136.","status":"published","published":"2025-01-14T00:00:00Z","modified":"2025-11-03T21:00:13Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T19:49:31.7352Z"}],"ghsa":[{"id":"GHSA-mf23-wm84-g9x3","title":"IPv4-in-IPv6 and IPv6-in-IPv6 tunneling (RFC 2473) do not require the validation or verification...","description":"IPv4-in-IPv6 and IPv6-in-IPv6 tunneling (RFC 2473) do not require the validation or verification of the source of a network packet, allowing an attacker to spoof and route arbitrary traffic via an exposed network interface. This is a similar issue to CVE-2020-10136.","status":"published","published":"2025-01-14T21:31:48Z","modified":"2025-11-03T21:32:10Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-940"],"updated_at":"2026-11-02T15:04:20.412437Z"}],"nvd":[{"id":"CVE-2025-23018","description":"IPv4-in-IPv6 and IPv6-in-IPv6 tunneling (RFC 2473) do not require the validation or verification of the source of a network packet, allowing an attacker to spoof and route arbitrary traffic via an exposed network interface. This is a similar issue to CVE-2020-10136.","status":"published","published":"2025-01-14T20:15:32.44Z","modified":"2026-06-17T08:51:28.007Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L","level":"medium","assessor":"primary"}],"cwes":["CWE-940"],"updated_at":"2026-11-02T14:10:48.713733Z"}]}}