CVE-2020-0796 CISA KEV · Actively exploitedLinked to ransomwareSuited to automated attack · CISA

Memory buffer overflow in Microsoft Windows 10 Version 1903 For 32 Bit Systems

CVSS score

10.0

EPSS probability

%99.8

Risk score

20.0

Published

6 y ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

Impact on My Inventory

Only the personal products you have added to your account are assessed; an organisation's inventory does not appear here.

Checking session…

Vulnerability description

DayBreach CVE AI Research

CVE-2020-0796 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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'.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2020-0796 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	microsoft	Windows 10 Version 1903 for 32-bit Systems	View
2	microsoft	Windows 10 Version 1903 for x64-based Systems	View
3	microsoft	Windows 10 Version 1903 for ARM64-based Systems	View
4	microsoft	Windows Server, version 1903 (Server Core installation)	View
5	microsoft	Windows 10 Version 1909 for 32-bit Systems	View
6	microsoft	Windows 10 Version 1909 for x64-based Systems	View
7	microsoft	Windows 10 Version 1909 for ARM64-based Systems	View
8	microsoft	Windows Server, version 1909 (Server Core installation)	View
9	microsoft	windows 10 1903	View
10	microsoft	windows 10 1909	View
11	microsoft	windows server 1903	View
12	microsoft	windows server 1909	View

Total affected vendors: 1|Products: 12

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
10.0	CVSS V31	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H	NVD
10.0	CVSS V3_1	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H	CVE ADP
7.5	CVSS V2	—	AV:N/AC:L/Au:N/C:P/I:P/A:P	NVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

1 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source

canonical

Apply updates per vendor instructions.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Apply the official update named in the evidence only to the matching product and version.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

This CVE is marked as actively exploited in the CISA KEV catalogue, but no verified, downloadable public PoC or Metasploit module has been found yet. Evidence of active exploitation does not mean that public exploit code exists.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-0796 is associated with the following CWEs:

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2020-0796 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsGerekmiyor

UserGerekmiyor

Official Sources and Advisories

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796vendor-advisory http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3.1.1-Proof-Of-Concept.htmlvendor-advisory http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execution.htmlvendor-advisory http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local-Privilege-Escalation.htmlvendor-advisory http://packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-Overflow.htmlvendor-advisory http://packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost-Remote-Code-Execution.htmlvendor-advisory http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-Remote-Code-Execution-Proof-Of-Concept.htmlvendor-advisory https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0796nvd CISA Known Exploited Vulnerabilities Catalogkev

CVSS Vector Radar Chart

10.0 / 10

Vulnerability Scoring Details

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

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone required

User InteractionNone required

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)None

Availability (Erişilebilirlik)High

Yama doğrulandı

1 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

Follow the vendor

microsoft

Weakness Type (CWE & CAPEC)

CWE-119

Similar Vulnerabilities

9.8

CVE-2025-53770 Actively exploited

Get this vulnerability through the API

Affected products, version ranges, exploitation status and patch information in a single request, with a free key.

Get a free key Documentation

curl -H "x-api-key: $DAYBREACH_API_KEY" \
  "https://api.enginteksut.com.tr/api/v1/intel/cves/CVE-2020-0796"