CVE-2020-0646

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 5 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 99%CVSS: 9.8Exploit: cisa kev · ssvc active · Metasploit · Exploit-DB (verified) · epss top5pct · epss high · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
99%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

January 14, 2020

Last Modified

October 29, 2025

Advisory Details (3)

Auto-updated Sep 17, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: microsoft, cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0646
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0646
generic

Packet Storm Security

http://packetstormsecurity.com/files/156930/SharePoint-Workflows-XOML-Injection.html

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 90× in last 7d / 380× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 1,341 total refreshes for this CVE.

  1. 2026-09-19 03:31 UTCVendor advisory
  2. 2026-09-19 03:30 UTCGHSA enrichment
  3. 2026-09-18 23:33 UTCVendor advisory
  4. 2026-09-18 23:33 UTCGHSA enrichment
  5. 2026-09-18 19:36 UTCEG score recompute
  6. 2026-09-18 19:36 UTCVendor advisory
  7. 2026-09-18 19:36 UTCGHSA enrichment
  8. 2026-09-18 19:23 UTCEPSS rescore
  9. 2026-09-18 19:20 UTCCISA KEV update
  10. 2026-09-18 15:38 UTCVendor advisory
  11. 2026-09-18 15:38 UTCGHSA enrichment
  12. 2026-09-18 14:15 UTCCISA KEV update
  13. 2026-09-18 11:37 UTCVendor advisory
  14. 2026-09-18 11:37 UTCGHSA enrichment
  15. 2026-09-18 07:40 UTCVendor advisory
  16. 2026-09-18 07:40 UTCGHSA enrichment
  17. 2026-09-18 03:43 UTCVendor advisory
  18. 2026-09-18 03:43 UTCGHSA enrichment
  19. 2026-09-17 23:46 UTCVendor advisory
  20. 2026-09-17 23:46 UTCGHSA enrichment
  21. 2026-09-17 19:48 UTCVendor advisory
  22. 2026-09-17 19:48 UTCGHSA enrichment
  23. 2026-09-17 15:51 UTCVendor advisory
  24. 2026-09-17 15:51 UTCGHSA enrichment
  25. 2026-09-17 11:54 UTCVendor advisory
Show 75 more
  1. 2026-09-17 11:54 UTCGHSA enrichment
  2. 2026-09-17 07:57 UTCVendor advisory
  3. 2026-09-17 07:57 UTCGHSA enrichment
  4. 2026-09-17 04:00 UTCVendor advisory
  5. 2026-09-17 04:00 UTCGHSA enrichment
  6. 2026-09-17 00:03 UTCVendor advisory
  7. 2026-09-17 00:03 UTCGHSA enrichment
  8. 2026-09-16 20:05 UTCVendor advisory
  9. 2026-09-16 20:05 UTCGHSA enrichment
  10. 2026-09-16 16:08 UTCVendor advisory
  11. 2026-09-16 16:08 UTCGHSA enrichment
  12. 2026-09-16 14:10 UTCCISA KEV update
  13. 2026-09-16 12:11 UTCVendor advisory
  14. 2026-09-16 12:11 UTCGHSA enrichment
  15. 2026-09-16 08:14 UTCVendor advisory
  16. 2026-09-16 08:13 UTCGHSA enrichment
  17. 2026-09-16 04:14 UTCVendor advisory
  18. 2026-09-16 04:13 UTCGHSA enrichment
  19. 2026-09-16 00:12 UTCVendor advisory
  20. 2026-09-16 00:12 UTCGHSA enrichment
  21. 2026-09-15 20:15 UTCVendor advisory
  22. 2026-09-15 20:15 UTCGHSA enrichment
  23. 2026-09-15 16:18 UTCVendor advisory
  24. 2026-09-15 16:18 UTCGHSA enrichment
  25. 2026-09-15 12:20 UTCVendor advisory
  26. 2026-09-15 12:20 UTCGHSA enrichment
  27. 2026-09-15 08:23 UTCVendor advisory
  28. 2026-09-15 08:23 UTCGHSA enrichment
  29. 2026-09-15 04:25 UTCVendor advisory
  30. 2026-09-15 04:25 UTCGHSA enrichment
  31. 2026-09-15 00:28 UTCVendor advisory
  32. 2026-09-15 00:28 UTCGHSA enrichment
  33. 2026-09-14 20:31 UTCVendor advisory
  34. 2026-09-14 20:31 UTCGHSA enrichment
  35. 2026-09-14 19:24 UTCCISA KEV update
  36. 2026-09-14 16:34 UTCVendor advisory
  37. 2026-09-14 16:34 UTCGHSA enrichment
  38. 2026-09-14 12:37 UTCVendor advisory
  39. 2026-09-14 12:37 UTCGHSA enrichment
  40. 2026-09-14 08:39 UTCVendor advisory
  41. 2026-09-14 08:39 UTCGHSA enrichment
  42. 2026-09-14 04:42 UTCVendor advisory
  43. 2026-09-14 04:42 UTCGHSA enrichment
  44. 2026-09-14 00:45 UTCVendor advisory
  45. 2026-09-14 00:45 UTCGHSA enrichment
  46. 2026-09-13 20:48 UTCVendor advisory
  47. 2026-09-13 20:48 UTCGHSA enrichment
  48. 2026-09-13 16:51 UTCVendor advisory
  49. 2026-09-13 16:51 UTCGHSA enrichment
  50. 2026-09-13 12:54 UTCVendor advisory
  51. 2026-09-13 12:54 UTCGHSA enrichment
  52. 2026-09-13 08:56 UTCVendor advisory
  53. 2026-09-13 08:56 UTCGHSA enrichment
  54. 2026-09-13 05:00 UTCVendor advisory
  55. 2026-09-13 04:59 UTCGHSA enrichment
  56. 2026-09-13 01:03 UTCVendor advisory
  57. 2026-09-13 01:03 UTCGHSA enrichment
  58. 2026-09-12 21:06 UTCVendor advisory
  59. 2026-09-12 21:06 UTCGHSA enrichment
  60. 2026-09-12 17:09 UTCVendor advisory
  61. 2026-09-12 17:09 UTCGHSA enrichment
  62. 2026-09-12 13:12 UTCVendor advisory
  63. 2026-09-12 13:12 UTCGHSA enrichment
  64. 2026-09-12 09:14 UTCVendor advisory
  65. 2026-09-12 09:14 UTCGHSA enrichment
  66. 2026-09-12 05:17 UTCVendor advisory
  67. 2026-09-12 05:17 UTCGHSA enrichment
  68. 2026-09-12 01:20 UTCVendor advisory
  69. 2026-09-12 01:20 UTCGHSA enrichment
  70. 2026-09-11 21:23 UTCVendor advisory
  71. 2026-09-11 21:23 UTCGHSA enrichment
  72. 2026-09-11 18:49 UTCCISA KEV update
  73. 2026-09-11 17:25 UTCVendor advisory
  74. 2026-09-11 17:25 UTCGHSA enrichment
  75. 2026-09-11 13:28 UTCGHSA enrichment

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 Metasploit module) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-48275✓ verified
    First seen Mar 31, 2020

    SharePoint Workflows - XOML Injection (Metasploit)

    Open source ↗
  • Metasploitexploit/windows/http/sharepoint_workflows_xoml✓ verified
    First seen Mar 2, 2020

    SharePoint Workflows XOML Injection

    Open source ↗

Frequently asked(6)

What is CVE-2020-0646?
CVE-2020-0646 is a critical vulnerability published on January 14, 2020. A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.
When was CVE-2020-0646 disclosed?
CVE-2020-0646 was first published in the National Vulnerability Database on January 14, 2020, with the most recent update on October 29, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-0646 actively exploited?
Yes. CISA added CVE-2020-0646 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Microsoft .NET Framework. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2020-0646?
CVE-2020-0646 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2020-0646?
CVE-2020-0646 affects Microsoft .NET Framework. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2020-0646?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-0646, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2020-0646

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