{"id":"CVE-2026-32201","published":"2026-04-14T18:17:27Z","modified":"2026-10-26T22:10:00Z","title":"Microsoft SharePoint Server Improper Input Validation Vulnerability","vendor":"Microsoft","product":"SharePoint Server","tier":"core","eol":null,"description":{"text":"Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.","provenance":"source","from":"NVD"},"summary":{"text":"Microsoft SharePoint Server contains an improper input validation flaw in its Office SharePoint component. 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https://nvd.nist.gov/vuln/detail/CVE-2026-32201","provenance":"source"},"vulncheckKev":{"dateAdded":"2026-04-12","exploitedFirstSeen":"2026-04-12","ransomware":false,"evidence":[{"url":"https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit","date":"2026-04-12"},{"url":"https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Apr","date":"2026-04-14"},{"url":"https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-32201","date":"2026-04-14"},{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32201","date":"2026-04-14"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2026-04-14"},{"url":"https://www.cisa.gov/news-events/alerts/2026/07/14/cisa-urges-sharepoint-hardening-after-new-exploitations","date":"2026-07-14"},{"url":"https://www.tenable.com/blog/cve-2026-32201-cve-2026-45659-cve-2026-56164-faq-sharepoint-server-exploitation","date":"2026-07-16"},{"url":"https://www.resecurity.com/es/blog/article/from-web-request-to-domain-compromise-understanding-the-july-2026-sharepoint-attacks","date":"2026-07-18"},{"url":"https://www.acn.gov.it/portale/documents/20119/1300791/Operational_Summary_lug26_CLEAR.pdf/88b05799-3e4c-f3ed-4a42-d9e68e080604?t=1787220905144","date":"2026-08-20"},{"url":"https://ti.qianxin.com/uploads/2026/10/29/20ab59a356a884498644cff73d47a13a.pdf","date":"2026-10-29"}],"evidenceTotal":10,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev 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2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"}],"provenance":"machine"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32201","tags":["Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-32201","tags":["Third Party Advisory","US Government Resource"]}],"techniques":[{"id":"T1190","name":"Exploit Public-Facing Application","tactics":["initial-access"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Unauthenticated network exploit of public-facing 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expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-22587","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-22587","exploited":true,"exploitedSince":"2026-04-14","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":1,"skipped":0,"earliest":"2026-04-22","earliestUrl":"https://github.com/B1tBit/CVE-2026-32201-exploit","repos":[{"name":"B1tBit/CVE-2026-32201-exploit","url":"https://github.com/B1tBit/CVE-2026-32201-exploit","stars":1,"created":"2026-04-22"}]},"first":{"date":"2026-04-22","source":"PoC-in-GitHub","url":"https://github.com/B1tBit/CVE-2026-32201-exploit"},"provenance":"source"},"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1565"],"provenance":"ai"}],"timeline":[{"date":"2026-04-12","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV 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