CVE-2020-0796
critical CISA KEVMicrosoft SMBv3 Remote Code Execution Vulnerability
Vendor / product: Microsoft — SMBv3
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'.
CVSS
10.0
10.0 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2020-03-12 16:15
Modified: 2026-10-01 20:17
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-10-27 07:07 UTC
Exploitation
Listed in CISA KEV
Added 2022-02-10 · due 2022-08-10
Known ransomware use: Known
Required action (CISA)
Apply updates per vendor instructions.
Affected products
microsoft / windows_10_1903 all versions
microsoft / windows_10_1909 all versions
microsoft / windows_server_1903 all versions
microsoft / windows_server_1909 all versions
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796
Patch / mitigation: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796
References
- http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3... secure@microsoft.com
- http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execut... secure@microsoft.com
- http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local-Privilege... secure@microsoft.com
- http://packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-Overflow.html secure@microsoft.com
- http://packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost-Remote-Code-Executi... secure@microsoft.com
- http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-Remote-Cod... secure@microsoft.com
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796 secure@microsoft.com
- http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3... af854a3a-2127-422b-91ae-364da2661108
- http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execut... af854a3a-2127-422b-91ae-364da2661108
- http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local-Privilege... af854a3a-2127-422b-91ae-364da2661108
- http://packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-Overflow.html af854a3a-2127-422b-91ae-364da2661108
- http://packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost-Remote-Code-Executi... af854a3a-2127-422b-91ae-364da2661108
- http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-Remote-Cod... af854a3a-2127-422b-91ae-364da2661108
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796 af854a3a-2127-422b-91ae-364da2661108
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0796 134c704f-9b21-4f2e-91b3-4a467353bcc0
Data sources
CISA KEV — fetched 2026-10-27 06:50 UTC · record ↗
NVD CVE API 2.0 — fetched 2026-10-27 07:07 UTC · record ↗