What is CVE-2026-65660?
Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Timeline
- 2026-08-11Published to the U.S. National Vulnerability Database (NVD)
- 2026-09-25Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
- 2026-09-26NVD record last updated
- 2026-09-28CISA federal remediation deadline (BOD 22-01)
CISA Known Exploited Vulnerability
Microsoft SharePoint Code Injection Vulnerability
Affected product
Microsoft SharePoint
Remediation Steps
- Review CISA Known Exploited Vulnerabilities catalog for full technical details
- Determine if your organization uses the affected product
- Consult vendor security advisories for patch availability and timeline
- Plan patching within one week given active exploitation
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65660
- https://blog.previdian.com/cve-2026-65660-previdian-observes-two-stage-sharepoint-exploitation-attempts/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-65660
- https://nvd.nist.gov/vuln/detail/CVE-2026-65660
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Referenced in our briefings & reports
- Vulnerability Priority Report – Week 3 of September 2026 (September 21 – 27)
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🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.