CVE-2020-0796

CRITICALNVD 10.010.0
EchelonGraph scoreHIGH confidence

“—” 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.

Triggered by: CISA KEV (actively exploited)
Sources: CISA Known Exploited Vulnerabilities catalog, EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this weekExploited in the wild

Also known asEUVD-2020-2283 (ENISA EUVD) · GHSA-vh23-87v3-h8c6 (GitHub Security Advisories)Source: ENISA EUVD

10.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV) — the reason this is sooner than the SSVC decision on this page at low mission impact
CISA-KEV: ExploitedEPSS PROB: 99.8%CVSS: 10.0Exploit: Metasploit · other public PoCExposed services: Not assessed

A fix is available — apply it.

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'.

CVSS v3
10.0
EG Score
10.0CRITICALhigh confidence
EG Risk
100
EG 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

Vendor 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.

  1. 2026-11-01 10:19 UTCEG score recompute
  2. 2026-11-01 10:19 UTCVendor advisory
  3. 2026-11-01 10:19 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  4. 2026-10-31 16:28 UTCEPSS rescoreEPSS 99.8% · 99th percentile
  5. 2026-10-31 12:20 UTCEG score recompute
  6. 2026-10-31 12:20 UTCVendor advisory
  7. 2026-10-31 12:19 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  8. 2026-10-30 14:19 UTCEG score recompute
  9. 2026-10-30 14:19 UTCVendor advisory
  10. 2026-10-30 14:19 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  11. 2026-10-29 16:21 UTCVendor advisory
  12. 2026-10-29 16:20 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  13. 2026-10-28 18:21 UTCEG score recompute
  14. 2026-10-28 18:21 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  15. 2026-10-27 20:22 UTCEG score recompute
  16. 2026-10-27 20:22 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  17. 2026-10-26 22:24 UTCEG score recompute
  18. 2026-10-26 22:23 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  19. 2026-10-26 00:23 UTCVendor advisory
  20. 2026-10-26 00:23 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  21. 2026-10-25 18:54 UTCEG score recompute
  22. 2026-10-25 16:28 UTCEPSS rescoreEPSS 99.8% · 99th percentile
  23. 2026-10-25 02:24 UTCEG score recompute
  24. 2026-10-25 02:24 UTCVendor advisory
  25. 2026-10-25 02:24 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
Show 75 more
  1. 2026-10-24 16:28 UTCEPSS rescoreEPSS 99.8% · 99th percentile
  2. 2026-10-24 04:25 UTCEG score recompute
  3. 2026-10-24 04:25 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  4. 2026-10-23 06:26 UTCEG score recompute
  5. 2026-10-23 06:26 UTCVendor advisory
  6. 2026-10-23 06:26 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  7. 2026-10-22 08:27 UTCEG score recompute
  8. 2026-10-22 08:27 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  9. 2026-10-21 10:28 UTCEG score recompute
  10. 2026-10-21 10:28 UTCVendor advisory
  11. 2026-10-21 10:27 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  12. 2026-10-20 12:28 UTCEG score recompute
  13. 2026-10-20 12:28 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  14. 2026-10-19 14:27 UTCEG score recompute
  15. 2026-10-19 14:27 UTCVendor advisory
  16. 2026-10-19 14:27 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  17. 2026-10-18 16:27 UTCVendor advisory
  18. 2026-10-18 16:27 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  19. 2026-10-18 09:38 UTCEG score recompute
  20. 2026-10-17 20:12 UTCEG score recompute
  21. 2026-10-17 20:12 UTCVendor advisory
  22. 2026-10-17 20:12 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  23. 2026-10-16 22:12 UTCEG score recompute
  24. 2026-10-16 22:12 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  25. 2026-10-16 00:11 UTCEG score recompute
  26. 2026-10-16 00:11 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  27. 2026-10-15 02:10 UTCEG score recompute
  28. 2026-10-15 02:10 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  29. 2026-10-14 04:09 UTCEG score recompute
  30. 2026-10-14 04:09 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  31. 2026-10-13 06:09 UTCVendor advisory
  32. 2026-10-13 06:09 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  33. 2026-10-12 19:49 UTCEG score recompute
  34. 2026-10-12 08:08 UTCVendor advisory
  35. 2026-10-12 08:08 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  36. 2026-10-12 04:03 UTCVendor advisory
  37. 2026-10-12 04:03 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  38. 2026-10-11 23:56 UTCVendor advisory
  39. 2026-10-11 23:56 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  40. 2026-10-11 19:52 UTCEG score recompute
  41. 2026-10-11 19:52 UTCVendor advisory
  42. 2026-10-11 19:51 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  43. 2026-10-11 15:48 UTCEG score recompute
  44. 2026-10-11 15:48 UTCVendor advisory
  45. 2026-10-11 15:48 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  46. 2026-10-11 11:45 UTCEG score recompute
  47. 2026-10-11 11:45 UTCVendor advisory
  48. 2026-10-11 11:45 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  49. 2026-10-11 07:42 UTCVendor advisory
  50. 2026-10-11 07:42 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  51. 2026-10-11 03:38 UTCVendor advisory
  52. 2026-10-11 03:38 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  53. 2026-10-10 23:35 UTCVendor advisory
  54. 2026-10-10 23:34 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  55. 2026-10-10 19:30 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  56. 2026-10-10 15:26 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  57. 2026-10-10 11:21 UTCVendor advisory
  58. 2026-10-10 11:21 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  59. 2026-10-10 07:18 UTCVendor advisory
  60. 2026-10-10 07:18 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  61. 2026-10-10 03:15 UTCVendor advisory
  62. 2026-10-10 03:15 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  63. 2026-10-09 23:12 UTCVendor advisory
  64. 2026-10-09 23:12 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  65. 2026-10-09 19:08 UTCVendor advisory
  66. 2026-10-09 19:08 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  67. 2026-10-09 15:05 UTCVendor advisory
  68. 2026-10-09 15:05 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  69. 2026-10-09 11:02 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  70. 2026-10-09 06:59 UTCVendor advisory
  71. 2026-10-09 06:59 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  72. 2026-10-09 02:56 UTCVendor advisory
  73. 2026-10-09 02:56 UTCGHSA enrichmentGHSA-vh23-87v3-h8c6 · GitHub severity HIGH · GitHub CVSS 10.0
  74. 2026-10-08 22:53 UTCVendor advisory
  75. 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✓ verified
    Published May 20, 2021

    SMBv3 Compression Buffer Overflow

    Open source ↗
  • Metasploitexploit/windows/local/cve_2020_0796_smbghost✓ verified
    Published Apr 3, 2020

    SMBv3 Compression Buffer Overflow

    Open source ↗
  • Nucleinetwork/cves/2020/CVE-2020-0796.yaml
    Published Jun 28, 2025

    Microsoft SMBv3 - Remote Code Execution

    Open source ↗
  • GitHub PoCrsmudge/CVE-2020-0796-BOF
    Published Sep 17, 2020
    Open source ↗
  • GitHub checkerBarriuso/SMBGhost_AutomateExploitation
    Published Jun 10, 2020

    SMBGhost (CVE-2020-0796) Automate Exploitation and Detection

    Open source ↗
  • Exploit-DBEDB-48537
    Published Jun 2, 2020

    Microsoft Windows - 'SMBGhost' Remote Code Execution

    Open source ↗
  • GitHub PoCjamf/CVE-2020-0796-RCE-POC
    Published Apr 20, 2020

    CVE-2020-0796 Remote Code Execution POC

    Open source ↗
  • GitHub PoCRvn0xsy/CVE_2020_0796_CNA
    Published Apr 6, 2020

    Cobalt Strike AggressorScripts CVE-2020-0796

    Open source ↗
  • GitHub PoCjiansiting/CVE-2020-0796
    Published Apr 1, 2020
    Open source ↗
  • Exploit-DBEDB-48267
    Published Mar 30, 2020

    Microsoft Windows 10 (1903/1909) - 'SMBGhost' SMB3.1.1 'SMB2_COMPRESSION_CAPABILITIES' Local Privilege Escalation

    Open source ↗

Frequently asked(6)

What is CVE-2020-0796?
CVE-2020-0796 is a critical-severity vulnerability; its CVE record was published on March 12, 2020. 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'.
When was the CVE record for CVE-2020-0796 published?
The CVE record for CVE-2020-0796 was published on March 12, 2020. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 1, 2026; the record at its source may have been updated since.
Is CVE-2020-0796 actively exploited?
Yes. CISA added CVE-2020-0796 to the Known Exploited Vulnerabilities catalog on February 10, 2022, affecting Microsoft SMBv3. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate attention. A fix is available. Apply it.
What is the CVSS score of CVE-2020-0796?
CVE-2020-0796 has a CVSS v3 base score of 10.0 (NVD).
Which products are affected by CVE-2020-0796?
CVE-2020-0796 affects Microsoft SMBv3.
How do I remediate CVE-2020-0796?
A fix for CVE-2020-0796 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2020-0796 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2020-0796

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