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Vulnerabilities / CVE-2026-65660

CVE-2026-65660

Published 2026-08-11 · published (not yet in NVD)

CVE-2026-65660

Microsoft SharePoint Server Remote Code Execution Vulnerability

Exploited in the wild: CISA added it to the Known Exploited Vulnerabilities catalog on 2026-09-25, with a fix-by date of 2026-09-28. Patch it first.

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.

8.8 HIGH
CVSS 3.1 · CNA
8.2%
chance of exploitation in the next 30 days (EPSS; higher than 94% of CVEs)

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

Scores

Affected products

  • Microsoft Microsoft SharePoint Enterprise Server 2016: 16.0.0 to < 16.0.5565.1001
  • Microsoft Microsoft SharePoint Server 2019: 16.0.0 to < 16.0.10417.20198
  • Microsoft Microsoft SharePoint Server Subscription Edition: 16.0.0 to < 16.0.19725.20522

Weakness: CWE-94

1 references (advisories, patches, write-ups)

Sources: CVE.org, FIRST EPSS. Missing ones did not answer or have no record yet.

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