{"id":"CVE-2026-50522","title":"Microsoft SharePoint Remote Code Execution Vulnerability","summary":"Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","cvssSource":"cna","cwe":["CWE-502"],"vendor":"Microsoft","product":"Microsoft SharePoint Enterprise Server 2016","affected":["sharepoint_enterprise_server_2016 >= 16.0.0 < 16.0.5561.1001","sharepoint_server_2019 >= 16.0.0 < 16.0.10417.20175","sharepoint_server_subscription_edition >= 16.0.0 < 16.0.19725.20434"],"ssvc":{"exploitation":"active","automatable":"yes","technicalImpact":"total","timestamp":"2026-07-13T00:00:00+00:00"},"exploited":true,"exploitAvailable":true,"published":"2026-07-14","updated":"2026-09-17","sourceUpdated":"2026-09-17T22:29:27.049Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-50522","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50522","label":"Microsoft SharePoint Remote Code Execution Vulnerability"}],"tags":["cve.org","in-the-wild","exploit-available","kev"],"epss":0.854,"epssPercentile":0.99715,"kev":true,"kevDateAdded":"2026-07-22","kevDueDate":"2026-07-25","kevRansomware":false,"exploits":{"github":5,"githubRepos":["https://github.com/4minx/CVE-2026-50522","https://github.com/WismanSec/sharepoint-2026-poc","https://github.com/HORKimhab/CVE-2026-50522"],"checkedAt":"2026-09-21T15:29:22.553Z"},"ingestedAt":"2026-09-08T17:06:31.927Z","slug":"CVE-2026-50522","body":"## Overview\n\nDeserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.\n\n## Affected\n\n- `sharepoint_enterprise_server_2016 >= 16.0.0 < 16.0.5561.1001`\n- `sharepoint_server_2019 >= 16.0.0 < 16.0.10417.20175`\n- `sharepoint_server_subscription_edition >= 16.0.0 < 16.0.19725.20434`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"hadal","depthScore":96,"depthScoreParts":{"impact":53.9,"likelihood":17.1,"exploitation":25,"ransomware":0},"changes":[]}