CVE-2020-0796

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Summary

CVECVE-2020-0796
StatePUBLISHED
Assignermicrosoft
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-03-12 16:15:15 UTC
Updated2026-08-12 05:17:28 UTC
DescriptionA 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'.

Risk And Classification

Primary CVSS: v3.1 10 CRITICAL from [email protected]

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

EPSS: 0.998100000 probability, percentile 0.999580000 (date 2026-08-13)

CISA KEV: Listed on 2022-02-10; due 2022-08-10; ransomware use Known

Problem Types: CWE-119 | Remote Code Execution | CWE-119 CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary10CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
3.1ADPDECLARED10CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary10CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
2.0[email protected]Primary7.5AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

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

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial

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

CISA Known Exploited Vulnerability

VendorMicrosoft
ProductSMBv3
NameMicrosoft SMBv3 Remote Code Execution Vulnerability
Required ActionApply updates per vendor instructions.
Noteshttps://nvd.nist.gov/vuln/detail/CVE-2020-0796

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Microsoft Windows 10 1903 - All All All
Operating System Microsoft Windows 10 1903 - All All All
Operating System Microsoft Windows 10 1903 - All All All
Operating System Microsoft Windows 10 1909 - All All All
Operating System Microsoft Windows 10 1909 - All All All
Operating System Microsoft Windows 10 1909 - All All All
Operating System Microsoft Windows Server 1903 - All All All
Operating System Microsoft Windows Server 1909 - All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Microsoft Windows 10 Version 1903 For 32-bit Systems affected unspecified Not specified
CNA Microsoft Windows 10 Version 1903 For X64-based Systems affected unspecified Not specified
CNA Microsoft Windows 10 Version 1903 For ARM64-based Systems affected unspecified Not specified
CNA Microsoft Windows Server Version 1903 Server Core Installation affected unspecified Not specified
CNA Microsoft Windows 10 Version 1909 For 32-bit Systems affected unspecified Not specified
CNA Microsoft Windows 10 Version 1909 For X64-based Systems affected unspecified Not specified
CNA Microsoft Windows 10 Version 1909 For ARM64-based Systems affected unspecified Not specified
CNA Microsoft Windows Server Version 1909 Server Core Installation affected unspecified Not specified

References

ReferenceSourceLinkTags
www.cisa.gov/known-exploited-vulnerabilities-catalog 134c704f-9b21-4f2e-91b3-4a467353bcc0 www.cisa.gov US Government Resource
SMBv3 Compression Buffer Overflow ≈ Packet Storm af854a3a-2127-422b-91ae-364da2661108 packetstormsecurity.com Exploit, Third Party Advisory, VDB Entry
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796 af854a3a-2127-422b-91ae-364da2661108 portal.msrc.microsoft.com Patch, Vendor Advisory
Microsoft Windows SMB 3.1.1 Remote Code Execution ≈ Packet Storm af854a3a-2127-422b-91ae-364da2661108 packetstormsecurity.com Exploit, Third Party Advisory, VDB Entry
CoronaBlue / SMBGhost Microsoft Windows 10 SMB 3.1.1 Proof Of Concept ≈ Packet Storm af854a3a-2127-422b-91ae-364da2661108 packetstormsecurity.com Third Party Advisory, VDB Entry
SMBleed / SMBGhost Pre-Authentication Remote Code Execution Proof Of Concept ≈ Packet Storm af854a3a-2127-422b-91ae-364da2661108 packetstormsecurity.com Third Party Advisory, VDB Entry
Microsoft Windows 10 SMB 3.1.1 Local Privilege Escalation ≈ Packet Storm af854a3a-2127-422b-91ae-364da2661108 packetstormsecurity.com Third Party Advisory, VDB Entry
Microsoft Windows SMBGhost Remote Code Execution ≈ Packet Storm af854a3a-2127-422b-91ae-364da2661108 packetstormsecurity.com Third Party Advisory, VDB Entry
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev

Additional Advisory Data

SourceTimeEvent
ADP2022-02-10T00:00:00.000ZCVE-2020-0796 added to CISA KEV

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