{"id":"CVE-2026-65660","aliases":["EUVD-2026-56431","GHSA-r94x-x846-rxqx"],"status":"published","title":"Microsoft SharePoint Server Remote Code Execution Vulnerability","description":"Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.09852,"percentile":0.956,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-94"],"published":"2026-08-11T17:04:55Z","modified":"2026-10-30T17:20:39Z","kev":{"date_added":"2026-09-25","due_date":"2026-09-28","required_action":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2026-09-25"},{"source":"kev","since":"2026-09-25"}],"exploits":[{"source":"pocgithub","id":"HORKimhab/CVE-2026-65660","title":"HORKimhab/CVE-2026-65660","date":"2026-09-25","url":"https://github.com/HORKimhab/CVE-2026-65660"}],"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-2026-65660","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://blog.previdian.com/cve-2026-65660-previdian-observes-two-stage-sharepoint-exploitation-attempts/","tags":["third-party-advisory","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-65660","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-65660"},{"url":"https://blog.previdian.com/cve-2026-65660-previdian-observes-two-stage-sharepoint-exploitation-attempts"},{"url":"https://github.com/advisories/GHSA-r94x-x846-rxqx"}],"sources":{"cve":[{"id":"CVE-2026-65660","title":"Microsoft SharePoint Server Remote Code Execution Vulnerability","description":"Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.","status":"published","published":"2026-08-11T17:04:55.666Z","modified":"2026-11-10T21:58:37.144Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-94"],"updated_at":"2026-11-10T22:48:52.144232Z"}],"euvd":[{"id":"EUVD-2026-56431","description":"Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.","status":"published","published":"2026-08-11T17:04:55Z","modified":"2026-11-10T21:58:37Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"exploited_since":"2026-09-25","updated_at":"2026-11-10T23:24:17.839385Z"}],"ghsa":[{"id":"GHSA-r94x-x846-rxqx","title":"Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows...","description":"Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.","status":"published","published":"2026-08-11T18:31:36Z","modified":"2026-09-25T18:32:20Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T15:12:27.190195Z"}],"kev":[{"id":"CVE-2026-65660","title":"Microsoft SharePoint Code Injection Vulnerability","description":"Microsoft SharePoint contains a code injection vulnerability which could allow an authorized attacker to execute code over a network.","cwes":["CWE-94"],"kev":{"date_added":"2026-09-25","due_date":"2026-09-28","required_action":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2026-65660","description":"Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.","status":"published","published":"2026-08-11T17:18:54.08Z","modified":"2026-10-26T13:10:00.14Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:12:36.880938Z"}]}}