CVE WatchOct 1, 2026

CVE-2020-0796

Microsoft SMBv3 Remote Code Execution Vulnerability

CVSS

10.0

Critical

EPSS

99.8%

p100

KEV

YES

Feb 10, 2022

Exploit Today

0-100

Published: Mar 12, 2020 · Last modified: Oct 1, 2026 · CWE-119

EPSS · 30d

99.8%EPSS · 30 days99.8%

2026-09-162026-10-14

KEV catalog record

Product

Microsoft / SMBv3

Vulnerability

Microsoft SMBv3 Remote Code Execution Vulnerability

Added to KEV

Feb 10, 2022

Remediate by

Aug 10, 2022

Known ransomware use

Yes

Summary description

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.

Required action

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2020-0796

Technical 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'.

Official references

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