CVE-2020-0796

CRITICAL10.0

CISA KEV

Published 2020-03-12 · Updated 2026-10-01 · Source secure@microsoft.com

Summary

CVE-2020-0796 is a critical-severity (CVSS 10.0) vulnerability in Microsoft SMBv3. CISA added it to the Known Exploited Vulnerabilities catalog on February 10, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by August 10, 2022. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.

All 390 known-exploited Microsoft vulnerabilities →

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'.

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

CWE-119CWE-119

CISA Known-Exploited Vulnerability

Product: Microsoft — SMBv3

Name: Microsoft SMBv3 Remote Code Execution Vulnerability

Date added: 2022-02-10 · Due: 2022-08-10

USED IN RANSOMWARE

Required action: Apply updates per vendor instructions.

References

View on NVD

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