{"id":"CVE-2025-53770","aliases":["EUVD-2025-23309","GHSA-xcrc-8vqv-vc8r"],"status":"published","title":"Microsoft SharePoint Server Remote Code Execution Vulnerability","description":"Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network.\nMicrosoft is aware that an exploit for CVE-2025-53770 exists in the wild.\nMicrosoft is preparing and fully testing a comprehensive update to address this vulnerability.  In the meantime, please make sure that the mitigation provided in this CVE documentation is in place so that you are protected from exploitation.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:W/RC:C","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.99999,"percentile":0.99991,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-502"],"published":"2025-07-20T01:06:33Z","modified":"2026-08-04T05:16:34Z","kev":{"date_added":"2025-07-20","due_date":"2025-07-21","required_action":"Disconnect public-facing versions of SharePoint Server that have reached their end-of-life (EOL) or end-of-service (EOS) to include SharePoint Server 2013 and earlier versions. For supported versions, please follow the mitigations according to CISA (URL listed below in Notes) and vendor instructions (URL listed below in Notes). 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-2025-53770-Exploit"},{"source":"pocgithub","id":"bitsalv/ToolShell-Honeypot","title":"bitsalv/ToolShell-Honeypot","date":"2025-07-25","url":"https://github.com/bitsalv/ToolShell-Honeypot"},{"source":"exploitdb","id":"EDB-52405","title":"Microsoft SharePoint Server 2019 (16.0.10383.20020) - Remote Code Execution (RCE)","type":"remote","platform":"windows","date":"2025-08-11","url":"https://www.exploit-db.com/exploits/52405"},{"source":"nuclei","id":"CVE-2025-53770","title":"Microsoft SharePoint Server - Remote Code Execution (ToolShell)","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-53770.yaml"}],"exploits_more":20,"products":[{"vendor":"microsoft","product":"microsoft sharepoint enterprise server 2016"},{"vendor":"microsoft","product":"microsoft sharepoint server 2019"},{"vendor":"microsoft","product":"microsoft sharepoint server subscription edition"},{"vendor":"microsoft","product":"sharepoint"},{"vendor":"microsoft","product":"sharepoint_server"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53770","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53770","tags":["government-resource","US Government Resource"]},{"url":"https://msrc.microsoft.com/blog/2025/07/customer-guidance-for-sharepoint-vulnerability-cve-2025-53770/","tags":["Mitigation","Vendor Advisory"]},{"url":"https://www.cisa.gov/news-events/alerts/2025/07/20/microsoft-releases-guidance-exploitation-sharepoint-vulnerability-cve-2025-53770","tags":["Mailing List","Third Party Advisory","US Government Resource"]},{"url":"https://research.eye.security/sharepoint-under-siege/","tags":["Exploit","Mitigation","Third Party Advisory"]},{"url":"https://www.bleepingcomputer.com/news/microsoft/microsoft-sharepoint-zero-day-exploited-in-rce-attacks-no-patch-available/","tags":["Press/Media Coverage"]},{"url":"https://www.forbes.com/sites/daveywinder/2025/07/20/microsoft-confirms-ongoing-mass-sharepoint-attack---no-patch-available/","tags":["Press/Media Coverage"]},{"url":"https://x.com/Shadowserver/status/1946900837306868163","tags":["Third Party Advisory"]},{"url":"https://github.com/kaizensecurity/CVE-2025-53770","tags":["Exploit"]},{"url":"https://therecord.media/microsoft-sharepoint-zero-day-vulnerability-exploited-globally","tags":["Press/Media Coverage"]},{"url":"https://news.ycombinator.com/item?id=44629710","tags":["Issue Tracking"]},{"url":"https://arstechnica.com/security/2025/07/sharepoint-vulnerability-with-9-8-severity-rating-is-under-exploit-across-the-globe/","tags":["Exploit","Press/Media Coverage"]},{"url":"https://www.darkreading.com/remote-workforce/microsoft-rushes-emergency-fix-exploited-sharepoint-toolshell-flaw","tags":["Press/Media Coverage"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-53770"},{"url":"https://msrc.microsoft.com/blog/2025/07/customer-guidance-for-sharepoint-vulnerability-cve-2025-53770"},{"url":"https://research.eye.security/sharepoint-under-siege"},{"url":"https://www.bleepingcomputer.com/news/microsoft/microsoft-sharepoint-zero-day-exploited-in-rce-attacks-no-patch-available"},{"url":"https://www.forbes.com/sites/daveywinder/2025/07/20/microsoft-confirms-ongoing-mass-sharepoint-attack---no-patch-available"},{"url":"https://arstechnica.com/security/2025/07/sharepoint-vulnerability-with-9-8-severity-rating-is-under-exploit-across-the-globe"},{"url":"https://github.com/advisories/GHSA-xcrc-8vqv-vc8r"}],"sources":{"cve":[{"id":"CVE-2025-53770","title":"Microsoft SharePoint Server Remote Code Execution Vulnerability","description":"Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network.\nMicrosoft is aware that an exploit for CVE-2025-53770 exists in the wild.\nMicrosoft is preparing and fully testing a comprehensive update to address this vulnerability.  In the meantime, please make sure that the mitigation provided in this CVE documentation is in place so that you are protected from exploitation.","status":"published","published":"2025-07-20T01:06:33.607Z","modified":"2026-08-04T03:55:52.588Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:W/RC:C","level":"critical","assessor":"cna"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:32:48.853452Z"}],"euvd":[{"id":"EUVD-2025-23309","description":"Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network.\nMicrosoft is aware that an exploit for CVE-2025-53770 exists in the wild.\nMicrosoft is preparing and fully testing a comprehensive update to address this vulnerability.  In the meantime, please make sure that the mitigation provided in this CVE documentation is in place so that you are protected from exploitation.","status":"published","published":"2025-07-20T01:06:33Z","modified":"2026-08-04T03:55:52Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:W/RC:C","level":"critical"}],"exploited_since":"2025-07-20","updated_at":"2026-11-02T18:02:23.332335Z"}],"ghsa":[{"id":"GHSA-xcrc-8vqv-vc8r","title":"Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an...","description":"Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network.\nMicrosoft is aware that an exploit for CVE-2025-53770 exists in the wild.\nMicrosoft is preparing and fully testing a comprehensive update to address this vulnerability.  In the meantime, please make sure that the mitigation provided in this CVE documentation is in place so that you are protected from exploitation.","status":"published","published":"2025-07-20T03:30:19Z","modified":"2025-10-22T00:34:26Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T15:04:09.266545Z"}],"kev":[{"id":"CVE-2025-53770","title":"Microsoft SharePoint Deserialization of Untrusted Data Vulnerability","description":"Microsoft SharePoint Server on-premises contains a deserialization of untrusted data vulnerability that could allow an unauthorized attacker to execute code over a network. This vulnerability could be chained with CVE-2025-53771. 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Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.","known_ransomware_use":"Known"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2025-53770","description":"Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network.\nMicrosoft is aware that an exploit for CVE-2025-53770 exists in the wild.\nMicrosoft is preparing and fully testing a comprehensive update to address this vulnerability.  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