CVE-2020-0796

highpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.998 · 100 %ileexploit · functionalDEEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 91 exploits · functional

Likely / severe?

99.8% (100th) EPSS

CVSS 7.5 · high

Is it mine?

18 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

added 2022-02-10remediate by 2022-08-10

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-26

Microsoft 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'.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedSICK MEAC2012 with Microsoft Windows 10 Version 1903 & 1909sick_psirt
This issue has been addressed in the Microsoft update for CVE-2020-0796.
https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/adv200005#ID0EUGAC
FixedSICK MEAC300 with Microsoft Windows 10 Version 1903 & 1909sick_psirt
This issue has been addressed in the Microsoft update for CVE-2020-0796.
https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/adv200005#ID0EUGAC
MitigationSICK MEAC2012 with Microsoft Windows 10 Version 1903 & 1909sick_psirt
Should Microsoft's remediation not be possible, we recommend following the workaround suggested by Microsoft and operate the MEAC in a protected networking environment. Blocking TCP port 445 at the perimeter firewall of the network segment will help to protect systems that are behind that firewall from exploits of this vulnerability.
MitigationSICK MEAC300 with Microsoft Windows 10 Version 1903 & 1909sick_psirt
Should Microsoft's remediation not be possible, we recommend following the workaround suggested by Microsoft and operate the MEAC in a protected networking environment. Blocking TCP port 445 at the perimeter firewall of the network segment will help to protect systems that are behind that firewall from exploits of this vulnerability.

cvss

Technical severity, 0–10. One row per scoring source.

10.0

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–10

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 6

v3.18.4highAV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hsecondaryexploitability 3.9 · impact 6

v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hsecondary · SICK PSIRT DE

v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-119USprimaryCWE-119US

exploits (91)

Public proof-of-concept and weaponised exploit code.

exploit/windows/local/cve_2020_0796_smbghostSMBv3 Compression Buffer Overflowfunctional · metasploit
EDB-48216Microsoft Windows 10 (1903/1909) - 'SMBGhost' SMB3.1.1 'SMB2_COMPRESSION_CAPABILITIES' Buffer Overflow (PoC)PoC · exploit_db
EDB-48267Microsoft Windows 10 (1903/1909) - 'SMBGhost' SMB3.1.1 'SMB2_COMPRESSION_CAPABILITIES' Local Privilege EscalationPoC · exploit_db
EDB-48537Microsoft Windows - 'SMBGhost' Remote Code ExecutionPoC · exploit_db
exploit/windows/smb/cve_2020_0796_smbghostSMBv3 Compression Buffer OverflowPoC · metasploit
0x25bit/CVE-2020-0796-PoCWeaponized PoC for SMBv3 TCP codec/compression vulnerabilityPoC · poc_in_github

affected products (18)

Products and version ranges known to be affected.

Microsoft Windows 10 Version 1903 for 32-bit Systems≤ unspecifiedenisa_euvdEU
Microsoft Windows 10 Version 1903 for ARM64-based Systems≤ unspecifiedenisa_euvdEU
Microsoft Windows 10 Version 1903 for x64-based Systems≤ unspecifiedenisa_euvdEU
Microsoft Windows 10 Version 1909 for 32-bit Systems≤ unspecifiedenisa_euvdEU
Microsoft Windows 10 Version 1909 for ARM64-based Systems≤ unspecifiedenisa_euvdEU
Microsoft Windows 10 Version 1909 for x64-based Systems≤ unspecifiedenisa_euvdEU
Microsoft Windows Server, version 1903 (Server Core installation)≤ unspecifiedenisa_euvdEU
Microsoft Windows Server, version 1909 (Server Core installation)≤ unspecifiedenisa_euvdEU
Microsoft Corp Windows 10 1903all versionsfstec_bduRU
Microsoft Corp Windows 10 1909all versionsfstec_bduRU
Microsoft Corp Windows Server 1903 (Server Core Installation)all versionsfstec_bduRU
Microsoft Corp Windows Server 1909 (Server Core Installation)all versionsfstec_bduRU
microsoft windows 10 1903all versionsnvdUScpe:2.3:o:microsoft:windows_10_1903:*:*:*:*:*:*:*:*
microsoft windows 10 1909all versionsnvdUScpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:*:*
microsoft windows server 1903all versionsnvdUScpe:2.3:o:microsoft:windows_server_1903:*:*:*:*:*:*:*:*
microsoft windows server 1909all versionsnvdUScpe:2.3:o:microsoft:windows_server_1909:*:*:*:*:*:*:*:*
SICK MEAC2012 with Microsoft Windows 10 Version 1903 & 1909all versionssick_psirtDE
SICK MEAC300 with Microsoft Windows 10 Version 1903 & 1909all versionssick_psirtDE

advisories (1)

Vendor and ecosystem advisories describing this.

SCA-2020-0003MEAC affected by Windows SMBv3 vulnerability2020-08-07csaf · sick_psirtDE
Microsoft disclosed a critical vulnerability in the way Microsoft Server Message Block 3.1.1 (SMBv3) handles compressed connections. That may allow unauthenticated attackers to execute arbitrary code on a vulnerable device. Since the MEAC central emission monitoring computer (EPC) acts as a SMB server to provide MEAC workstations with access to the filesystem in distributed MEAC-systems, the devices are affected by this vulnerability. Exploitation of this vulnerability could lead to remote code execution under login with administrator privileges.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd sick_psirt NVD CVE.org MITRE

published 2020-03-12modified 2026-08-12

related (21,028)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2026-88779US	high7.5OT critical	11.4% (96th)	KEV	2026-10-04
Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: before 14.1-73.41, before 13.1-64.28, before 14.1-73.41 FIPS, and before 13.1-37.282; Gateway: before…
CVE-2026-88772US	high8.1OT critical	78.2% (100th)	KEV	2026-09-27
Vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FI…
CVE-2026-8452US	critical9.8OT critical	1.01% (63rd)	KEV	2026-06-30
Memory overflow vulnerability NetScaler ADC and NetScaler Gateway leading to unpredictable or erroneous behavior and Denial of Service if the appliance is configured as a Gateway (…
CVE-2026-53266US	—OT critical	0.93% (61st)	KEV	2026-06-25
In the Linux kernel, the following vulnerability has been resolved: netfilter: bridge: make ebt_snat ARP rewrite writable The ebtables SNAT target keeps the Ethernet source addre…
CVE-2026-3910US	high8.8OT critical	2.69% (86th)	KEV	2026-03-13
Inappropriate implementation in V8 in Google Chrome prior to 146.0.7680.75 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium s…

+21023 more

references (34)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan