{"basis":"claimed","id":"CVE-2026-58644","name":"Microsoft SharePoint Deserialization of Untrusted Data Vulnerability","vendorProject":"Microsoft","product":"SharePoint","publishedAt":"2026-07-14","cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1"},"exploited":{"kevAdded":"2026-07-16","dueDate":"2026-07-19","ransomware":false},"epss":{"score":0.15873,"percentile":0.96887,"date":"2026-11-02"},"coverage":{"cloudflare":{"status":"none","firstOn":null,"daysToRule":null},"aws":{"status":"none","firstOn":null,"daysToRule":null},"azure":{"status":"none","firstOn":null,"daysToRule":null},"google":{"status":"none","firstOn":null,"daysToRule":null},"fastly":{"status":"no_history","firstOn":null,"daysToRule":null},"f5":{"status":"none","firstOn":null,"daysToRule":null},"akamai":{"status":"no_source","firstOn":null,"daysToRule":null},"crs":{"status":"none","firstOn":null,"daysToRule":null}},"title":"Microsoft SharePoint Remote Code Execution Vulnerability","description":"Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.","cwes":["CWE-502"],"vendors":[{"vendor":"cloudflare","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"aws","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"azure","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"google","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"fastly","status":"no_history","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"f5","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"akamai","status":"no_source","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"crs","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]}],"updatedAt":"2026-11-02T23:17:39.095Z","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C","ssvc":{"exploitation":"active","automatable":"yes","technicalImpact":"total"},"measured":[{"engineId":"owasp-crs","engineName":"OWASP Core Rule Set","engineVersion":"4.25.0","runtime":"Coraza v3.8.1","config":"paranoia level 1, anomaly threshold 5, default CRS settings","ranAt":"2026-11-02T13:02:57.000Z","verdict":"partial","templateId":"CVE-2026-58644","templatePath":"http/cves/2026/CVE-2026-58644.yaml","requests":3,"blockedRequests":2,"rules":["934110","941100","941130"],"note":"","requestDetail":[{"method":"GET","path":"/_trust/default.aspx","status":200,"blocked":false,"rules":[]},{"method":"POST","path":"/_trust/default.aspx","status":403,"blocked":true,"rules":["934110","941100","941130"]},{"method":"POST","path":"/_trust/default.aspx","status":403,"blocked":true,"rules":["934110","941100","941130"]}]},{"engineId":"owasp-crs","engineName":"OWASP Core Rule Set","engineVersion":"4.25.0","runtime":"Coraza v3.8.1","config":"paranoia level 2, anomaly threshold 5, default CRS settings","ranAt":"2026-11-02T13:03:28.000Z","verdict":"partial","templateId":"CVE-2026-58644","templatePath":"http/cves/2026/CVE-2026-58644.yaml","requests":3,"blockedRequests":2,"rules":["931130","934110","941100","941130","941340","942131","942430","942520"],"note":"","requestDetail":[{"method":"GET","path":"/_trust/default.aspx","status":200,"blocked":false,"rules":[]},{"method":"POST","path":"/_trust/default.aspx","status":403,"blocked":true,"rules":["931130","934110","941100","941130","941340","942131"]},{"method":"POST","path":"/_trust/default.aspx","status":403,"blocked":true,"rules":["931130","934110","941100","941130","941340","942131"]}]}],"social":{"total":0,"first_seen":null,"daily":[{"day":"2026-10-20","posts":0},{"day":"2026-10-21","posts":0},{"day":"2026-10-22","posts":0},{"day":"2026-10-23","posts":0},{"day":"2026-10-24","posts":0},{"day":"2026-10-25","posts":0},{"day":"2026-10-26","posts":0},{"day":"2026-10-27","posts":0},{"day":"2026-10-28","posts":0},{"day":"2026-10-29","posts":0},{"day":"2026-10-30","posts":0},{"day":"2026-10-31","posts":0},{"day":"2026-11-01","posts":0},{"day":"2026-11-02","posts":0}],"top_posts":[],"exploit_repositories":[]}}