CVE-2026-65660
Microsoft SharePoint Code Injection Vulnerability
Microsoft SharePoint
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 25 September 2026. US federal agencies were required to remediate it by 28 September 2026.
Frequently asked questions
Is CVE-2026-65660 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2026-65660.
What does CVE-2026-65660 affect?
CVE-2026-65660 affects Microsoft SharePoint.
How severe is CVE-2026-65660?
It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 28 September 2026.
How should organisations respond to CVE-2026-65660?
Apply the vendor patch for Microsoft SharePoint as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.