{"id":"CVE-2025-59248","aliases":["EUVD-2025-34275","GHSA-4fp2-p8gm-qx95"],"status":"published","title":"Microsoft Exchange Server Spoofing Vulnerability","description":"Improper input validation in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01019,"percentile":0.63651,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2025-10-14T17:01:42Z","modified":"2026-10-18T21:10:00Z","products":[{"vendor":"microsoft","product":"exchange_server"},{"vendor":"microsoft","product":"exchange_server_subscription_edition"},{"vendor":"microsoft","product":"microsoft exchange server 2016 cumulative update 23"},{"vendor":"microsoft","product":"microsoft exchange server 2019 cumulative update 14"},{"vendor":"microsoft","product":"microsoft exchange server 2019 cumulative update 15"},{"vendor":"microsoft","product":"microsoft exchange server subscription edition rtm"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59248","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-59248"},{"url":"https://github.com/advisories/GHSA-4fp2-p8gm-qx95"}],"sources":{"cve":[{"id":"CVE-2025-59248","title":"Microsoft Exchange Server Spoofing Vulnerability","description":"Improper input validation in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2025-10-14T17:01:42.916Z","modified":"2026-02-22T17:26:02.096Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:32:47.812946Z"}],"euvd":[{"id":"EUVD-2025-34275","description":"Improper input validation in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2025-10-14T17:01:42Z","modified":"2026-02-22T17:26:02Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-02T19:48:35.625588Z"}],"ghsa":[{"id":"GHSA-4fp2-p8gm-qx95","title":"Improper input validation in Microsoft Exchange Server allows an unauthorized attacker to perform...","description":"Improper input validation in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2025-10-14T18:30:35Z","modified":"2025-10-14T18:30:43Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:03:57.996157Z"}],"nvd":[{"id":"CVE-2025-59248","description":"Improper input validation in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2025-10-14T17:16:06.87Z","modified":"2026-10-18T21:10:00.12Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","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:H/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:11:38.17237Z"}]}}