Known Exploited Vulnerability
10.0
CRITICAL CVSS 3.1
CVE-2020-0796
Microsoft SMBv3 Remote Code Execution Vulnerability - [Actively Exploited]
Description

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'.

INFO

Published Date :

March 12, 2020, 4:15 p.m.

Last Modified :

Oct. 29, 2025, 2:27 p.m.

Remotely Exploit :

Yes !
CISA Notification
CISA KEV (Known Exploited Vulnerabilities)

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.

Description :

A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests. An attacker who successfully exploited the vulnerability could gain the ability to execute code on the target server or client.

Required Action :

Apply updates per vendor instructions.

Known Ransomware Campaign Use:

Known Detected Feb 10, 2022

Notes :

https://nvd.nist.gov/vuln/detail/CVE-2020-0796

Affected Products

The following products are affected by CVE-2020-0796 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Microsoft windows_10
2 Microsoft windows_server_2016
3 Microsoft windows_10_1909
4 Microsoft windows_server_1903
5 Microsoft windows_server_1909
6 Microsoft windows_10_1903
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 HIGH [email protected]
CVSS 3.1 CRITICAL [email protected]
CVSS 3.1 CRITICAL 134c704f-9b21-4f2e-91b3-4a467353bcc0
Solution
This vulnerability can be remediated by applying the relevant cumulative updates.
  • Apply the appropriate cumulative update.
  • Reboot the affected system.
Public PoC/Exploit Available at Github

CVE-2020-0796 has a 443 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2020-0796.

URL Resource
http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3.1.1-Proof-Of-Concept.html Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execution.html Exploit Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local-Privilege-Escalation.html Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-Overflow.html Exploit Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost-Remote-Code-Execution.html Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-Remote-Code-Execution-Proof-Of-Concept.html Third Party Advisory VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796 Patch Vendor Advisory
http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3.1.1-Proof-Of-Concept.html Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execution.html Exploit Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local-Privilege-Escalation.html Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-Overflow.html Exploit Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost-Remote-Code-Execution.html Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-Remote-Code-Execution-Proof-Of-Concept.html Third Party Advisory VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796 Patch Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0796 US Government Resource
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-0796 is associated with the following CWEs:

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

None

Makefile Go Dockerfile Shell JavaScript TSQL HTML TypeScript CSS Python

Updated: 2 days, 14 hours ago
0 stars 0 fork 0 watcher
Born at : April 27, 2026, 12:37 a.m. This repo has been linked 1 different CVEs too.

AI-powered network vulnerability scanner with CVE detection, EPSS exploit probability scoring, and automated remediation reports.

ai-security ai-security-tool cve cve-scanning cybersecurity epss infosec network-security pentest-tool python security-tools threat-intelligence vulnerability-scanner vulnerability-scanners nessus-alternative

Python

Updated: 18 hours, 47 minutes ago
0 stars 0 fork 0 watcher
Born at : April 25, 2026, 10:17 p.m. This repo has been linked 2 different CVEs too.

None

Python JavaScript HTML CSS Shell

Updated: 3 days, 8 hours ago
0 stars 0 fork 0 watcher
Born at : April 25, 2026, 5:37 p.m. This repo has been linked 3 different CVEs too.

None

Python

Updated: 2 days, 1 hour ago
0 stars 0 fork 0 watcher
Born at : April 23, 2026, 9:39 a.m. This repo has been linked 1 different CVEs too.

None

Python

Updated: 6 days, 8 hours ago
0 stars 0 fork 0 watcher
Born at : April 23, 2026, 7:04 a.m. This repo has been linked 9 different CVEs too.

network scanner, cybersec study project

Python

Updated: 1 week ago
0 stars 0 fork 0 watcher
Born at : April 22, 2026, 10:06 a.m. This repo has been linked 3 different CVEs too.

None

Updated: 1 week, 1 day ago
0 stars 0 fork 0 watcher
Born at : April 20, 2026, 8:39 p.m. This repo has been linked 1 different CVEs too.

Advanced TCP/UDP port scanner with OS detection and CVE hints

Python

Updated: 1 week, 2 days ago
0 stars 0 fork 0 watcher
Born at : April 19, 2026, 10:08 p.m. This repo has been linked 8 different CVEs too.

None

Rust Shell

Updated: 2 weeks ago
0 stars 0 fork 0 watcher
Born at : April 13, 2026, 12:56 p.m. This repo has been linked 1 different CVEs too.

Write-up from the TryHackMe Room Conti where I used splunk to investigate a compromised Exchange Server.

Updated: 2 weeks, 2 days ago
0 stars 0 fork 0 watcher
Born at : April 12, 2026, 9:36 p.m. This repo has been linked 3 different CVEs too.

Python tool that monitors network traffic to detect ransomware and malware before damage occurs. It watches live traffic, analyzes saved files, checks suspicious IPs against global threat databases, assigns a threat score, and auto-generates an incident report simulating a real SOC analyst workflow.

Makefile Python Dockerfile HTML YARA Go Template Shell

Updated: 5 days, 4 hours ago
2 stars 0 fork 0 watcher
Born at : April 11, 2026, 3:49 p.m. This repo has been linked 1 different CVEs too.

My penetration testing dashboard - runs nmap scans, msf exploitation, and loot the information in an easily digestible browser-based workflow.

Updated: 3 weeks, 3 days ago
0 stars 0 fork 0 watcher
Born at : April 4, 2026, 11:18 p.m. This repo has been linked 9 different CVEs too.

Памятка по эксплуатации Active Directory

Updated: 3 weeks, 3 days ago
0 stars 0 fork 0 watcher
Born at : April 4, 2026, 7:32 p.m. This repo has been linked 10 different CVEs too.

A comprehensive cyber attack analysis and detection project focusing on identifying vulnerabilities, simulating attacks, and implementing security measures using data-driven techniques.

Updated: 1 month ago
0 stars 0 fork 0 watcher
Born at : March 29, 2026, 3:16 p.m. This repo has been linked 20 different CVEs too.

Penetration testing Cheat Sheet with tools

Python C Shell PHP PowerShell ASP.NET

Updated: 1 month ago
0 stars 0 fork 0 watcher
Born at : March 29, 2026, 7:23 a.m. This repo has been linked 78 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-0796 vulnerability anywhere in the article.

  • CybersecurityNews
Makop Ransomware Exploits RDP Systems with AV Killer and Other Exploits

Makop ransomware, a strain of the Phobos malware family first spotted in 2020, continues to evolve into a significant threat to businesses worldwide. Recent analysis reveals that attackers are combini ... Read more

Published Date: Dec 09, 2025 (4 months, 2 weeks ago)
  • The Hacker News
Hackers Target Over 70 Microsoft Exchange Servers to Steal Credentials via Keyloggers

Unidentified threat actors have been observed targeting publicly exposed Microsoft Exchange servers to inject malicious code into the login pages that harvest their credentials. Positive Technologies, ... Read more

Published Date: Jun 24, 2025 (10 months ago)
  • Help Net Security
Researchers unearth keyloggers on Outlook login pages

Unknown threat actors have compromised internet-accessible Microsoft Exchange Servers of government organizations and companies around the world, and have injected the organizations’ Outlook on the We ... Read more

Published Date: Jun 17, 2025 (10 months, 1 week ago)

The following table lists the changes that have been made to the CVE-2020-0796 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Modified Analysis by [email protected]

    Oct. 29, 2025

    Action Type Old Value New Value
    Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0796 Types: US Government Resource
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 22, 2025

    Action Type Old Value New Value
    Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0796
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 21, 2025

    Action Type Old Value New Value
    Removed Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0796
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 21, 2025

    Action Type Old Value New Value
    Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0796
  • Modified Analysis by [email protected]

    Apr. 04, 2025

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:o:microsoft:windows_server_2016:1903:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1903:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:* OR *cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:arm64:* *cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:x86:* *cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:arm64:* *cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:x86:* *cpe:2.3:o:microsoft:windows_server_1909:-:*:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_server_1903:-:*:*:*:*:*:x64:*
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Feb. 04, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    Added CWE CWE-119
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3.1.1-Proof-Of-Concept.html
    Added Reference http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execution.html
    Added Reference http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local-Privilege-Escalation.html
    Added Reference http://packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-Overflow.html
    Added Reference http://packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost-Remote-Code-Execution.html
    Added Reference http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-Remote-Code-Execution-Proof-Of-Concept.html
    Added Reference https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Apr. 22, 2022

    Action Type Old Value New Value
    Changed Reference Type http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3.1.1-Proof-Of-Concept.html Third Party Advisory http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3.1.1-Proof-Of-Concept.html Third Party Advisory, VDB Entry
    Changed Reference Type http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execution.html Third Party Advisory http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry
    Changed Reference Type http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local-Privilege-Escalation.html No Types Assigned http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local-Privilege-Escalation.html Third Party Advisory, VDB Entry
    Changed Reference Type http://packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-Overflow.html No Types Assigned http://packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-Overflow.html Exploit, Third Party Advisory, VDB Entry
    Changed Reference Type http://packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost-Remote-Code-Execution.html No Types Assigned http://packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost-Remote-Code-Execution.html Third Party Advisory, VDB Entry
    Changed Reference Type http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-Remote-Code-Execution-Proof-Of-Concept.html No Types Assigned http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-Remote-Code-Execution-Proof-Of-Concept.html Third Party Advisory, VDB Entry
  • CWE Remap by [email protected]

    Jul. 21, 2021

    Action Type Old Value New Value
    Changed CWE CWE-20 CWE-119
  • CVE Modified by [email protected]

    Jun. 11, 2020

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-Remote-Code-Execution-Proof-Of-Concept.html [No Types Assigned]
  • CVE Modified by [email protected]

    Jun. 02, 2020

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost-Remote-Code-Execution.html [No Types Assigned]
  • CVE Modified by [email protected]

    Apr. 06, 2020

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-Overflow.html [No Types Assigned]
  • CVE Modified by [email protected]

    Mar. 31, 2020

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local-Privilege-Escalation.html [No Types Assigned]
  • Initial Analysis by [email protected]

    Mar. 16, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    Changed Reference Type http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3.1.1-Proof-Of-Concept.html No Types Assigned http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3.1.1-Proof-Of-Concept.html Third Party Advisory
    Changed Reference Type http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execution.html No Types Assigned http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execution.html Third Party Advisory
    Changed Reference Type https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796 No Types Assigned https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796 Patch, Vendor Advisory
    Added CWE NIST CWE-20
    Added CPE Configuration OR *cpe:2.3:o:microsoft:windows_10:1903:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:1903:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Mar. 15, 2020

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3.1.1-Proof-Of-Concept.html [No Types Assigned]
    Added Reference http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execution.html [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.