Microsoft Windows SMBv3 Compression RCE (ADV200005)(CVE-2020-0796)(Remote)

critical Nessus Plugin ID 134421


The remote Windows host is using a vulnerable version of SMB.


A remote code execution vulnerability exists in Microsoft Server Message Block 3.1.1 (SMBv3) protocol due to how it handles a maliciously crafted compressed data packet. An unauthenticated, remote attacker can exploit this to bypass authentication and execute arbitrary commands.

Note, the plugin checks if SMB 3.1.1 with compression is enabled. It does not currently verify the vulnerability itself.


Microsoft has provided additional details and guidance in the ADV200005 advisory.

See Also

Plugin Details

Severity: Critical

ID: 134421

File Name: smb_microsoft_windows_adv200005_remote.nasl

Version: 1.10

Type: remote

Agent: windows

Family: Windows

Published: 3/11/2020

Updated: 2/23/2023

Configuration: Enable paranoid mode

Risk Information


Risk Factor: Critical

Score: 10.0


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2020-0796


Risk Factor: Critical

Base Score: 10

Temporal Score: 9.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:H/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:microsoft:windows

Required KB Items: Settings/ParanoidReport, SMB/smb_dialect/3.1.1

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/12/2020

Vulnerability Publication Date: 3/12/2020

CISA Known Exploited Vulnerability Due Dates: 8/10/2022

Exploitable With


Core Impact

Metasploit (SMBv3 Compression Buffer Overflow)

Reference Information

CVE: CVE-2020-0796