CVE-2025-62221

CRITICALPre-NVD 7.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2025-12-09), indicating real-world exploitation has been confirmed by US federal agencies. a secondary CVSS source baseline 7.8 retained for reference (NVD's own analysis pending). Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, secondary
Trending — 5 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 3%CVSS: 7.8Exploit: cisa kev · ssvc active · public exploitExposed: 0

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

Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

CVSS v3
7.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

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
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
3%
EPSS %ILE
84%
KEV
⚠ Exploited

Published

December 9, 2025

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Jun 3, 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-2025-62221
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

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

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62221

Weakness Classification(1)

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 100× in last 7d / 413× 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 1,529 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

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

  • GitHub PoCTeodor1231241/DEMO-Proof-of-Concept-Temporal-Memory-Inconsistency-in-cldflt.sys-CVE-2025-62221
    First seen Jan 18, 2026
    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2025-62221?
CVE-2025-62221 is a critical vulnerability published on December 9, 2025. Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.
When was CVE-2025-62221 disclosed?
CVE-2025-62221 was first published in the National Vulnerability Database on December 9, 2025, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-62221 actively exploited?
Yes. CISA added CVE-2025-62221 to the Known Exploited Vulnerabilities catalog on December 9, 2025, affecting Microsoft Windows. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2025-62221?
CVE-2025-62221 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2025-62221?
CVE-2025-62221 affects Microsoft Windows. 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-2025-62221?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-62221, 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-2025-62221

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