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'.
CVE-2020-0796
“—” beside the score: it is equal to NVD's CVSS score.
Score elevated to 10.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-02-10), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 10.0 retained for reference. Confidence: HIGH.
Also known asEUVD-2020-2283 (ENISA EUVD) · GHSA-vh23-87v3-h8c6 (GitHub Security Advisories)Source: ENISA EUVD
- Actively exploited in the wild (CISA-KEV) — the reason this is sooner than the SSVC decision on this page at low mission impact
A fix is available — apply it.
- CVSS v3
- 10.0
- EG Score
- 10.0CRITICALhigh confidence
- EG Risk
- 100EG Risk 100/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity100% × 45%Impact severity (EG Severity): CVSS 10.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation100% × 40%Fixed at 100% for a CISA KEV listing: EchelonGraph's rule.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Attend at low mission impact; Act at medium or high.Exploitation active (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it sooner than your standard update timelines at low mission impact and as soon as possible at medium or high. - EPSS PROB
- 99.8%
- EPSS %ILE
- 99th
- KEV
- ⚠ Exploited
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (10.0): severity, escalated by confirmed exploitation. This CVE's 10.0 is its impact severity (EG Severity), not escalated.
- EG Severity
- 10.0 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 99.8% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- CISA KEV and EG-KEV Tier 1 (exploited in the wild)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Act at medium mission impactAttend at low mission impact; Act at medium or high.CISA BOD 26-04: 3 days & forensic triage if the affected system is publicly exposed; 3 days & forensic triage if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Attend at low mission impact; Act at medium or high.
A fix is available. Apply it sooner than your standard update timelines at low mission impact and as soon as possible at medium or high.
Exploitation active (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)3 days & forensic triage if the affected system is publicly exposed; 3 days & forensic triage if it is not.
The score's inputs: In CISA KEV yes (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
CISA required action“Apply updates per vendor instructions.”
Quoted verbatim from CISA's Known Exploited Vulnerabilities catalog. CISA directs it at US federal civilian executive branch agencies under Binding Operational Directive (BOD) 26-04, which replaced BOD 22-01 on 10 June 2026; it is not EchelonGraph's advice. CISA's notes: https://nvd.nist.gov/vuln/detail/CVE-2020-0796
Published
March 12, 2020
Last Modified
October 1, 2026
Advisory Details (7)
Auto-updated Oct 30, 2026Packet Storm
http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local-Privilege-Escalation.htmlPacket Storm
http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execution.htmlPacket Storm
http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3.1.1-Proof-Of-Concept.htmlSecurity Update Guide - Microsoft Security Response Center
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796Packet Storm
http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-Remote-Code-Execution-Proof-Of-Concept.htmlVendor Advisories for CVE-2020-0796(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 18× in last 7d / 172× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 100 of 1,652 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 1,552 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-01 10:19 UTCEG score recompute
- 2026-11-01 10:19 UTCVendor advisory
- 2026-11-01 10:19 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-31 16:28 UTCEPSS rescoreEPSS 99.8% · 99th percentile
- 2026-10-31 12:20 UTCEG score recompute
- 2026-10-31 12:20 UTCVendor advisory
- 2026-10-31 12:19 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-30 14:19 UTCEG score recompute
- 2026-10-30 14:19 UTCVendor advisory
- 2026-10-30 14:19 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-29 16:21 UTCVendor advisory
- 2026-10-29 16:20 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-28 18:21 UTCEG score recompute
- 2026-10-28 18:21 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-27 20:22 UTCEG score recompute
- 2026-10-27 20:22 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-26 22:24 UTCEG score recompute
- 2026-10-26 22:23 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-26 00:23 UTCVendor advisory
- 2026-10-26 00:23 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-25 18:54 UTCEG score recompute
- 2026-10-25 16:28 UTCEPSS rescoreEPSS 99.8% · 99th percentile
- 2026-10-25 02:24 UTCEG score recompute
- 2026-10-25 02:24 UTCVendor advisory
- 2026-10-25 02:24 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
Show 75 moreShow fewer
- 2026-10-24 16:28 UTCEPSS rescoreEPSS 99.8% · 99th percentile
- 2026-10-24 04:25 UTCEG score recompute
- 2026-10-24 04:25 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-23 06:26 UTCEG score recompute
- 2026-10-23 06:26 UTCVendor advisory
- 2026-10-23 06:26 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-22 08:27 UTCEG score recompute
- 2026-10-22 08:27 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-21 10:28 UTCEG score recompute
- 2026-10-21 10:28 UTCVendor advisory
- 2026-10-21 10:27 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-20 12:28 UTCEG score recompute
- 2026-10-20 12:28 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-19 14:27 UTCEG score recompute
- 2026-10-19 14:27 UTCVendor advisory
- 2026-10-19 14:27 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-18 16:27 UTCVendor advisory
- 2026-10-18 16:27 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-18 09:38 UTCEG score recompute
- 2026-10-17 20:12 UTCEG score recompute
- 2026-10-17 20:12 UTCVendor advisory
- 2026-10-17 20:12 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-16 22:12 UTCEG score recompute
- 2026-10-16 22:12 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-16 00:11 UTCEG score recompute
- 2026-10-16 00:11 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-15 02:10 UTCEG score recompute
- 2026-10-15 02:10 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-14 04:09 UTCEG score recompute
- 2026-10-14 04:09 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-13 06:09 UTCVendor advisory
- 2026-10-13 06:09 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-12 19:49 UTCEG score recompute
- 2026-10-12 08:08 UTCVendor advisory
- 2026-10-12 08:08 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-12 04:03 UTCVendor advisory
- 2026-10-12 04:03 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-11 23:56 UTCVendor advisory
- 2026-10-11 23:56 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-11 19:52 UTCEG score recompute
- 2026-10-11 19:52 UTCVendor advisory
- 2026-10-11 19:51 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-11 15:48 UTCEG score recompute
- 2026-10-11 15:48 UTCVendor advisory
- 2026-10-11 15:48 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-11 11:45 UTCEG score recompute
- 2026-10-11 11:45 UTCVendor advisory
- 2026-10-11 11:45 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-11 07:42 UTCVendor advisory
- 2026-10-11 07:42 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-11 03:38 UTCVendor advisory
- 2026-10-11 03:38 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-10 23:35 UTCVendor advisory
- 2026-10-10 23:34 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-10 19:30 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-10 15:26 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-10 11:21 UTCVendor advisory
- 2026-10-10 11:21 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-10 07:18 UTCVendor advisory
- 2026-10-10 07:18 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-10 03:15 UTCVendor advisory
- 2026-10-10 03:15 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-09 23:12 UTCVendor advisory
- 2026-10-09 23:12 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-09 19:08 UTCVendor advisory
- 2026-10-09 19:08 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-09 15:05 UTCVendor advisory
- 2026-10-09 15:05 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-09 11:02 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-09 06:59 UTCVendor advisory
- 2026-10-09 06:59 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-09 02:56 UTCVendor advisory
- 2026-10-09 02:56 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
- 2026-10-08 22:53 UTCVendor advisory
- 2026-10-08 22:53 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
Publicly available exploits
(16 references, 10 shown)Public exploit code is referenced for this CVE (2 Metasploit modules, 3 Exploit-DB entries, 9 GitHub PoCs), as are 1 Nuclei detection template, 1 GitHub checker repository. A detection template checks whether a system is affected; it is not necessarily exploit code. A GitHub repository named or described as a checker or scanner checks whether a system is affected; it is not necessarily exploit code. Defenders should treat patch urgency accordingly.
- Metasploitexploit/windows/smb/cve_2020_0796_smbghost✓ verifiedPublished May 20, 2021
SMBv3 Compression Buffer Overflow
Open source ↗ - Metasploitexploit/windows/local/cve_2020_0796_smbghost✓ verifiedPublished Apr 3, 2020
SMBv3 Compression Buffer Overflow
Open source ↗ - Nucleinetwork/cves/2020/CVE-2020-0796.yamlPublished Jun 28, 2025
Microsoft SMBv3 - Remote Code Execution
Open source ↗ - Open source ↗GitHub PoCrsmudge/CVE-2020-0796-BOFPublished Sep 17, 2020
- GitHub checkerBarriuso/SMBGhost_AutomateExploitationPublished Jun 10, 2020
SMBGhost (CVE-2020-0796) Automate Exploitation and Detection
Open source ↗ - Exploit-DBEDB-48537Published Jun 2, 2020
Microsoft Windows - 'SMBGhost' Remote Code Execution
Open source ↗ - GitHub PoCjamf/CVE-2020-0796-RCE-POCPublished Apr 20, 2020
CVE-2020-0796 Remote Code Execution POC
Open source ↗ - GitHub PoCRvn0xsy/CVE_2020_0796_CNAPublished Apr 6, 2020
Cobalt Strike AggressorScripts CVE-2020-0796
Open source ↗ - Open source ↗GitHub PoCjiansiting/CVE-2020-0796Published Apr 1, 2020
- Exploit-DBEDB-48267Published Mar 30, 2020
Microsoft Windows 10 (1903/1909) - 'SMBGhost' SMB3.1.1 'SMB2_COMPRESSION_CAPABILITIES' Local Privilege Escalation
Open source ↗
Related CVEs(same CWE)
Same CWE
10 shownCWE-119 · CWE-20
Frequently asked(6)
What is CVE-2020-0796?
When was the CVE record for CVE-2020-0796 published?
Is CVE-2020-0796 actively exploited?
What is the CVSS score of CVE-2020-0796?
Which products are affected by CVE-2020-0796?
How do I remediate CVE-2020-0796?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2020-0796
Is Your Infrastructure Affected by CVE-2020-0796?
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