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 !
Source :
[email protected]
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.
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.
Apply updates per vendor instructions.
Known Detected Feb 10, 2022
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.
CVSS Scores
| 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
- Apply the appropriate cumulative update.
- Reboot the affected system.
Public PoC/Exploit Available at Github
CVE-2020-0796 has a 424 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.
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:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-0796
weaknesses.
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).
A comprehensive cyber attack analysis and detection project focusing on identifying vulnerabilities, simulating attacks, and implementing security measures using data-driven techniques.
Penetration testing Cheat Sheet with tools
Python C Shell PHP PowerShell ASP.NET
Conducted a full SOC investigation into a Conti ransomware compromise of an Exchange server using Splunk 8.2.2. Analysed 28,145 events across Windows Security, Sysmon, and IIS log sources to reconstruct the complete attack chain. Identified three exploited CVEs (CVE-2020-0796, CVE-2018-13374, CVE-2018-13379), located a trojanised cmd.exe
Advanced network vulnerability scanner — multi-threaded TCP port scanner, banner grabbing, 30+ service signatures, 22+ embedded CVEs, live NVD API integration, and auto-generated triage reports. Pure Python 3, zero dependencies. Educational & authorized testing only.
Python
Network vulnerability scanner with concurrent port scanning, CVE analysis, and CVSS risk scoring in Python
Python
A professional Python desktop tool for network vulnerability assessment — banner grabbing, service detection, CVE matching, NVD API lookup, and triage reporting in a dark-themed GUI. For educational and authorized testing only.
Python
Vuln Scanner - Security vulnerability scanning tool
Python
None
PowerShell
None
An automatic vulnerability scanner for an network in cleaner TUI
cve-scanning python tui vulnerability vulnerability-detection vulnerability-scanners
Python Dockerfile
None
Python C Shell PHP PowerShell ASP.NET
None
None
Python
A high performance SMB compliance and audit script using the impacket library for native protocol interaction. Supports share enumeration, permission auditing, password policy retrieval, user/group enumeration, and backup file discovery.
Python
Async network vulnerability scanner with CVE/CVSS scoring — Python
Python
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
-
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
-
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
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]