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
9.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 99%CVSS: 9.8Exploit: NoneExposed: 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)
EPSS
99.9%
KEV
⚠ Exploited

Published

January 14, 2020

Last Modified

October 29, 2025

Advisory Details (3)

Auto-updated Jun 1, 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

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 85× in last 7d / 373× 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 653 total refreshes for this CVE.

  1. 2026-07-22 20:22 UTCGHSA enrichment
  2. 2026-07-22 19:40 UTCCISA KEV update
  3. 2026-07-22 16:23 UTCEG score recompute
  4. 2026-07-22 16:23 UTCVendor advisory
  5. 2026-07-22 16:23 UTCGHSA enrichment
  6. 2026-07-22 14:05 UTCEPSS rescore
  7. 2026-07-22 12:25 UTCVendor advisory
  8. 2026-07-22 12:25 UTCGHSA enrichment
  9. 2026-07-22 08:27 UTCVendor advisory
  10. 2026-07-22 08:27 UTCGHSA enrichment
  11. 2026-07-22 04:29 UTCVendor advisory
  12. 2026-07-22 04:29 UTCGHSA enrichment
  13. 2026-07-22 00:31 UTCVendor advisory
  14. 2026-07-22 00:31 UTCGHSA enrichment
  15. 2026-07-21 20:33 UTCVendor advisory
  16. 2026-07-21 20:32 UTCGHSA enrichment
  17. 2026-07-21 16:34 UTCVendor advisory
  18. 2026-07-21 16:34 UTCGHSA enrichment
  19. 2026-07-21 14:37 UTCCISA KEV update
  20. 2026-07-21 12:36 UTCVendor advisory
  21. 2026-07-21 12:36 UTCGHSA enrichment
  22. 2026-07-21 08:39 UTCVendor advisory
  23. 2026-07-21 08:39 UTCGHSA enrichment
  24. 2026-07-21 04:42 UTCVendor advisory
  25. 2026-07-21 04:42 UTCGHSA enrichment
Show 75 more
  1. 2026-07-21 00:44 UTCVendor advisory
  2. 2026-07-21 00:44 UTCGHSA enrichment
  3. 2026-07-20 20:46 UTCVendor advisory
  4. 2026-07-20 20:46 UTCGHSA enrichment
  5. 2026-07-20 16:49 UTCGHSA enrichment
  6. 2026-07-20 12:52 UTCGHSA enrichment
  7. 2026-07-20 08:55 UTCVendor advisory
  8. 2026-07-20 08:55 UTCGHSA enrichment
  9. 2026-07-20 04:57 UTCVendor advisory
  10. 2026-07-20 04:57 UTCGHSA enrichment
  11. 2026-07-20 01:00 UTCVendor advisory
  12. 2026-07-20 01:00 UTCGHSA enrichment
  13. 2026-07-19 21:03 UTCVendor advisory
  14. 2026-07-19 21:03 UTCGHSA enrichment
  15. 2026-07-19 17:05 UTCVendor advisory
  16. 2026-07-19 17:05 UTCGHSA enrichment
  17. 2026-07-19 13:08 UTCVendor advisory
  18. 2026-07-19 13:08 UTCGHSA enrichment
  19. 2026-07-19 09:11 UTCVendor advisory
  20. 2026-07-19 09:11 UTCGHSA enrichment
  21. 2026-07-19 05:14 UTCVendor advisory
  22. 2026-07-19 05:14 UTCGHSA enrichment
  23. 2026-07-19 01:16 UTCGHSA enrichment
  24. 2026-07-18 21:17 UTCVendor advisory
  25. 2026-07-18 21:17 UTCGHSA enrichment
  26. 2026-07-18 17:18 UTCVendor advisory
  27. 2026-07-18 17:18 UTCGHSA enrichment
  28. 2026-07-18 13:21 UTCVendor advisory
  29. 2026-07-18 13:21 UTCGHSA enrichment
  30. 2026-07-18 09:24 UTCVendor advisory
  31. 2026-07-18 09:24 UTCGHSA enrichment
  32. 2026-07-18 05:27 UTCVendor advisory
  33. 2026-07-18 05:27 UTCGHSA enrichment
  34. 2026-07-18 01:30 UTCVendor advisory
  35. 2026-07-18 01:30 UTCGHSA enrichment
  36. 2026-07-17 21:33 UTCVendor advisory
  37. 2026-07-17 21:33 UTCGHSA enrichment
  38. 2026-07-17 17:36 UTCVendor advisory
  39. 2026-07-17 17:36 UTCGHSA enrichment
  40. 2026-07-17 13:39 UTCVendor advisory
  41. 2026-07-17 13:39 UTCGHSA enrichment
  42. 2026-07-17 09:41 UTCEG score recompute
  43. 2026-07-17 09:41 UTCVendor advisory
  44. 2026-07-17 09:41 UTCGHSA enrichment
  45. 2026-07-17 05:44 UTCVendor advisory
  46. 2026-07-17 05:43 UTCGHSA enrichment
  47. 2026-07-17 01:45 UTCVendor advisory
  48. 2026-07-17 01:45 UTCGHSA enrichment
  49. 2026-07-16 21:48 UTCVendor advisory
  50. 2026-07-16 21:48 UTCGHSA enrichment
  51. 2026-07-16 17:51 UTCVendor advisory
  52. 2026-07-16 17:51 UTCGHSA enrichment
  53. 2026-07-16 17:04 UTCCISA KEV update
  54. 2026-07-16 13:52 UTCGHSA enrichment
  55. 2026-07-16 09:53 UTCVendor advisory
  56. 2026-07-16 09:53 UTCGHSA enrichment
  57. 2026-07-16 05:56 UTCVendor advisory
  58. 2026-07-16 05:56 UTCGHSA enrichment
  59. 2026-07-16 01:59 UTCVendor advisory
  60. 2026-07-16 01:59 UTCGHSA enrichment
  61. 2026-07-15 22:01 UTCVendor advisory
  62. 2026-07-15 22:01 UTCGHSA enrichment
  63. 2026-07-15 18:04 UTCVendor advisory
  64. 2026-07-15 18:04 UTCGHSA enrichment
  65. 2026-07-15 16:49 UTCCISA KEV update
  66. 2026-07-15 15:04 UTCCISA KEV update
  67. 2026-07-15 14:04 UTCVendor advisory
  68. 2026-07-15 14:04 UTCGHSA enrichment
  69. 2026-07-15 10:05 UTCVendor advisory
  70. 2026-07-15 10:05 UTCGHSA enrichment
  71. 2026-07-15 06:09 UTCGHSA enrichment
  72. 2026-07-15 02:11 UTCGHSA enrichment
  73. 2026-07-14 22:14 UTCVendor advisory
  74. 2026-07-14 22:14 UTCGHSA enrichment
  75. 2026-07-14 18:16 UTCVendor advisory

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 ↗

Related CVEs(same vendor + same CWE)

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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