---
id: CVE-2026-65660
title: >-
  Improper control of generation of code ('code injection') in Microsoft Office
  SharePoint allows an authorized attacker to execute code over a network.
summary: >-
  Improper control of generation of code ('code injection') in Microsoft Office
  SharePoint allows an authorized attacker to execute code over a network.
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-94
vendor: microsoft
product: sharepoint_server
affected:
  - sharepoint_server < 16.0.19725.20522
  - sharepoint_server = 2016
  - sharepoint_server = 2019
patched:
  - sharepoint_server 16.0.19725.20522
published: '2026-08-11'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T04:17:45.630'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-65660'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65660'
    label: secure@microsoft.com
  - url: >-
      https://blog.previdian.com/cve-2026-65660-previdian-observes-two-stage-sharepoint-exploitation-attempts/
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-65660
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - in-the-wild
  - exploit-available
  - kev
exploited: true
exploitAvailable: true
ssvc:
  exploitation: active
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-25T15:40:09.216765Z'
epss: 0.08189
epssPercentile: 0.94841
kev: true
kevDateAdded: '2026-09-25'
kevDueDate: '2026-09-28'
kevRansomware: false
exploits:
  github: 2
  githubRepos:
    - 'https://github.com/ShadowForge-Cyber/CVE-2026-65660-Poc'
    - 'https://github.com/HORKimhab/CVE-2026-65660'
  checkedAt: '2026-10-27T19:07:40.385Z'
ingestedAt: '2026-09-08T18:07:34.897Z'
---

## Overview

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

## Affected

- `sharepoint_server < 16.0.19725.20522`
- `sharepoint_server = 2016`
- `sharepoint_server = 2019`

## Remediation

Upgrade past the affected range:

- `sharepoint_server 16.0.19725.20522`