{"id":"CVE-2026-45501","published":"2026-06-09T17:04:45Z","modified":"2026-09-24T13:43:47Z","title":"Microsoft Exchange Server Spoofing Vulnerability","vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 23","tier":"tail","description":{"text":"Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.","provenance":"source","from":"CVE.org"},"cvss":{"score":6.5,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.00402,"percentile":0.34373,"provenance":"source"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45501","tags":["vendor-advisory","patch"]}],"priority":{"score":11.4,"factors":[{"name":"EPSS percentile","points":6.87},{"name":"CVSS severity","points":4.55}]},"vendorSlug":"microsoft","affectedVersions":[{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 23","versions":[">= 15.01.0.0, < 15.01.2507.071"]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 14","versions":[">= 15.02.0.0, < 15.02.1544.043"]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 15","versions":[">= 15.02.0.0, < 15.02.1748.048"]},{"vendor":"Microsoft","product":"Microsoft Exchange Server Subscription Edition RTM","versions":[">= 15.02.0.0, < 15.02.2562.045"]}],"euvd":{"id":"EUVD-2026-35677","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-class-microsoft-exchange-server-cwe-918"}}