# CVE-2020-0796: Microsoft SMBv3 Remote Code Execution Vulnerability

> CVE-2020-0796: Microsoft SMBv3 Remote Code Execution Vulnerability. CVSS 10.0 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2020-0796
Last updated: 2026-10-01T19:56:22Z

- Published: 2020-03-12 15:48 UTC · Updated: 2026-10-01 19:56 UTC · Assigner: microsoft
- CVSS: 10.0 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS: 99.8%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-02-10, federal due date 2022-08-10, ransomware use: Known

## 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'.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Microsoft: Windows 10 Version 1903 for 32-bit Systems
- Microsoft: Windows 10 Version 1903 for ARM64-based Systems
- Microsoft: Windows 10 Version 1903 for x64-based Systems
- Microsoft: Windows 10 Version 1909 for 32-bit Systems
- Microsoft: Windows 10 Version 1909 for ARM64-based Systems
- Microsoft: Windows 10 Version 1909 for x64-based Systems
- Microsoft: Windows Server, version 1903 (Server Core installation)
- Microsoft: Windows Server, version 1909 (Server Core installation)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2020-0796)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2020-0796)
- [http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3.1.1-Proof-Of-Concept.html](http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3.1.1-Proof-Of-Concept.html)
- [http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execution.html](http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execution.html)
- [http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local-Privilege-Escalation.html](http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local-Privilege-Escalation.html)
- [http://packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-Overflow.html](http://packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-Overflow.html)
- [http://packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost-Remote-Code-Execution.html](http://packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost-Remote-Code-Execution.html)
- [http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-Remote-Code-Execution-Proof-Of-Concept.html](http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-Remote-Code-Execution-Proof-Of-Concept.html)
- [https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796](https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2020-0796 · Markdown: https://rewindex.com/cve/CVE-2020-0796.md · JSON: https://rewindex.com/api/v1/cves/CVE-2020-0796 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:05:19.129Z