CVE WatchSep 25, 2026

CVE-2026-65660

Microsoft SharePoint Code Injection Vulnerability

CVSS

8.8

High

EPSS

1.2%

p67

KEV

YES

Sep 25, 2026

Exploit Today

0-100

Published: Aug 11, 2026 · Last modified: Sep 25, 2026 · CWE-94

EPSS · 30d

0.8%EPSS · 30 days1.2%

2026-08-282026-09-25

KEV catalog record

Product

Microsoft / SharePoint

Vulnerability

Microsoft SharePoint Code Injection Vulnerability

Added to KEV

Sep 25, 2026

Remediate by

Sep 28, 2026

Known ransomware use

Summary description

Microsoft SharePoint contains a code injection vulnerability which could allow an authorized attacker to execute code over a network.

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.

Notes

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65660 ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-65660

Technical description

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

Official references

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