---
id: CVE-2020-0796
title: >-
  A remote code execution vulnerability exists in the way that the Microsoft
  Server Message Block 3.1.1 (SMBv3) protocol handles certain requests, aka
  'Windows SMBv3 Client/Server Remote Code Execution Vulnerability'.
summary: >-
  A remote code execution vulnerability exists in the way that the Microsoft
  Server Message Block 3.1.1 (SMBv3) protocol handles certain requests, aka
  'Windows SMBv3 Client/Server Remote Code Execution Vulnerability'.
severity: critical
cvss: 10
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-119
  - CWE-119
vendor: microsoft
product: windows_10_1903
affected:
  - windows_10_1903
  - windows_10_1909
  - windows_server_1903
  - windows_server_1909
published: '2020-03-12'
updated: '2026-08-12'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2020-0796'
references:
  - url: >-
      http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3.1.1-Proof-Of-Concept.html
    label: secure@microsoft.com
  - url: >-
      http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execution.html
    label: secure@microsoft.com
  - url: >-
      http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local-Privilege-Escalation.html
    label: secure@microsoft.com
  - url: >-
      http://packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-Overflow.html
    label: secure@microsoft.com
  - url: >-
      http://packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost-Remote-Code-Execution.html
    label: secure@microsoft.com
  - url: >-
      http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-Remote-Code-Execution-Proof-Of-Concept.html
    label: secure@microsoft.com
  - url: >-
      https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796
    label: secure@microsoft.com
  - url: >-
      http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3.1.1-Proof-Of-Concept.html
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execution.html
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local-Privilege-Escalation.html
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      http://packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-Overflow.html
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      http://packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost-Remote-Code-Execution.html
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-Remote-Code-Execution-Proof-Of-Concept.html
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0796
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - kev
  - in-the-wild
  - exploit-available
epss: 0.9981
epssPercentile: 0.99959
kev: true
kevDateAdded: '2022-02-10'
kevDueDate: '2022-08-10'
kevRansomware: true
exploited: true
exploitAvailable: true
ingestedAt: '2026-08-12T05:52:07.541Z'
exploits:
  exploitdb: true
  github: 86
  githubRepos:
    - 'https://github.com/k8gege/PyLadon'
    - 'https://github.com/0x25bit/CVE-2020-0796-PoC'
    - 'https://github.com/technion/DisableSMBCompression'
  metasploit:
    - exploit/windows/local/cve_2020_0796_smbghost
    - exploit/windows/smb/cve_2020_0796_smbghost
  nuclei:
    - network/cves/2020/CVE-2020-0796
  checkedAt: '2026-09-21T15:23:43.737Z'
---

## Overview

A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests, aka 'Windows SMBv3 Client/Server Remote Code Execution Vulnerability'.

## Affected

- `windows_10_1903`
- `windows_10_1909`
- `windows_server_1903`
- `windows_server_1909`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.