---
id: "CVE-2023-24955"
kind: "vulnerability"
aliases: ["CVE-2023-24955"]
title: "Microsoft SharePoint Server Remote Code Execution Vulnerability"
severity: "high"
cvss: 7.2
epss: null
exploited: true
status: "open"
category: "package"
products: [{"name": "Microsoft SharePoint Server", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft sharepoint enterprise server", "fixed": [], "affected": "= 2016", "ecosystem": "vendor"}, {"name": "microsoft sharepoint server", "fixed": [], "affected": "= 2019", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "on-prem", "package", "ransomware", "sharepoint", "windows"]
not_affected_if: ["auth-required", "sharepoint-online"]
published_at: "2023-05-09T18:15:13+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T22:29:05+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-24955", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-24955", "first_seen_at": "2026-10-23T22:29:05+00:00"}]
---

# Microsoft SharePoint Server Remote Code Execution Vulnerability

Microsoft SharePoint Server has a code injection flaw that lets a user with Site Owner rights run code on the server. CISA lists it as actively exploited, and the tags mark it as used in ransomware campaigns.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Microsoft SharePoint Server affected ? fixed ?
- vendor:microsoft sharepoint enterprise server affected = 2016 fixed ?
- vendor:microsoft sharepoint server affected = 2019 fixed ?

## Fix

Apply Microsoft's mitigations per vendor instructions, or stop using the product if mitigations are unavailable (per CISA required action). Specific patch versions: unknown.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-24955
- 2026-10-23T22:29:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2023-24955

## From the sources

Microsoft SharePoint Server contains a code injection vulnerability that allows an authenticated attacker with Site Owner privileges to execute code remotely.

CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_