CVE-2020-0796Microsoft SMBv3 Remote Code Execution Vulnerability

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'.

10.0 CRITICALEPSS 99.81%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-10-01 20:17 UTC

OverviewCVSS details

10.0CRITICALCVSS 3.1

Score source: NVD
NVD status: Analyzed
Published: Mar 12, 2020
Assigner: microsoft

Affected

Windows 10 Version 1903 for 32-bit Systems (Microsoft)

+7 more products →

Exploitation

Public exploit: Yes · 2 references
CISA KEV: Listed · Feb 10, 2022
KEV due date: Aug 10, 2022
Ransomware use: Known
SSVC: Exploitation active · Automatable yes · Impact total

EPSS · FIRST, scored Nov 8

99.81%chance of exploitation in 30 days

Higher than 99.95% of CVEs

CVSS 3.1 · NVD

10.0Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Changed
Confidentiality impact: High
Integrity impact: High
Availability impact: High

CVSS 2.0 · NVD

7.5High

AV:N/AC:L/Au:N/C:P/I:P/A:P

Attack vector: Network
Attack complexity: Low
Authentication: None
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
10.0	CRITICAL	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
7.5	HIGH	2.0NVD	AV:N/AC:L/Au:N/C:P/I:P/A:P

CISA required action

⚡ Known exploited · remediation due Aug 10, 2022

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Details

CVE ID: CVE-2020-0796
Status: Analyzed
Assigner (CNA): microsoft
Published: Mar 12, 2020
Last modified: 2026-10-01 20:17 UTC
Weaknesses: CWE-119

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-09 12:15 UTC.