CVE-2026-65660: listed in the CISA KEV catalog

CVE-2026-65660 · CVSS 6.5 MEDIUM · KEV 2026-09-25 · patch available

Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Is CVE-2026-65660 exploited?

• Listed in the CISA KEV catalog on 2026-09-25.
• Federal remediation due 2026-09-28.
• Past that date by 46 days.
• Public exploit code: none found in monitored sources.

Which products and versions are affected?

• Microsoft · Microsoft SharePoint Enterprise Server 2016 · >= 16.0.0, < 16.0.5565.1001
• Microsoft · Microsoft SharePoint Server 2019 · >= 16.0.0, < 16.0.10417.20198
• Microsoft · Microsoft SharePoint Server Subscription Edition · >= 16.0.0, < 16.0.19725.20522

Is there a patch?

Yes. Update to one of these or later:

From Microsoft's CVE record · Microsoft advisory

• KB5002905
• KB5002906
• KB5002894
• KB5002896
• KB5002893

From Microsoft's Security Update Guide · Microsoft advisory

What PlainSec published about CVE-2026-65660

• CISA puts SharePoint and RouterOS hits in KEV (2026-09-24)
• Adobe and Microsoft ship huge August patch loads (2026-08-12)

Primary sources

• NVD record
• CISA KEV catalog
• Microsoft KB5002905
• Microsoft KB5002906
• Microsoft KB5002894
• Microsoft KB5002896
• Microsoft KB5002893
• Microsoft advisory

What this record does not say

• No EPSS score.

KEV and EPSS are re-checked daily. Record last updated 2026-10-18.