{"id":"CVE-2025-59248","published":"2025-10-14T17:01:42Z","modified":"2026-02-22T17:26:02Z","title":"Microsoft Exchange Server Spoofing Vulnerability","vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 23","tier":"tail","description":{"text":"Improper input validation in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.","provenance":"source","from":"CVE.org"},"cvss":{"score":7.5,"severity":"HIGH","version":"3.1","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","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.01019,"percentile":0.63254,"provenance":"source"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59248","tags":["vendor-advisory","patch"]}],"priority":{"score":17.9,"factors":[{"name":"EPSS percentile","points":12.65},{"name":"CVSS severity","points":5.25}]},"vendorSlug":"microsoft","affectedVersions":[{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 23","versions":[">= 15.01.0.0, < 15.01.2507.061"]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 14","versions":[">= 15.02.0.0, < 15.02.1544.036"]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 15","versions":[">= 15.02.0.0, < 15.02.1748.039"]},{"vendor":"Microsoft","product":"Microsoft Exchange Server Subscription Edition RTM","versions":[">= 15.02.0.0, < 15.02.2562.029"]}],"euvd":{"id":"EUVD-2025-34275","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-class-microsoft-exchange-server-cwe-20"}}