CVE-2022-21999

CRITICALNVD 7.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-03-25), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.8 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
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 42%CVSS: 7.8Exploit: cisa kev · ssvc active · kev ransomware · Metasploit · epss top5pct · public exploitExposed: 0

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

Windows Print Spooler Elevation of Privilege Vulnerability

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
42%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

February 9, 2022

Last Modified

October 30, 2025

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-2022-21999
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-2022-21999

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 102× in last 7d / 425× 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 1,389 total refreshes for this CVE.

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

Publicly available exploits

(2 references)

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

  • GitHub PoCly4k/SpoolFool
    First seen Feb 8, 2022

    Exploit for CVE-2022-21999 - Windows Print Spooler Elevation of Privilege Vulnerability (LPE)

    Open source ↗
  • Metasploitexploit/windows/local/cve_2022_21999_spoolfool_privesc✓ verified
    First seen Feb 8, 2022

    CVE-2022-21999 SpoolFool Privesc

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2022-21999?
CVE-2022-21999 is a critical vulnerability published on February 9, 2022. Windows Print Spooler Elevation of Privilege Vulnerability
When was CVE-2022-21999 disclosed?
CVE-2022-21999 was first published in the National Vulnerability Database on February 9, 2022, with the most recent update on October 30, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-21999 actively exploited?
Yes. CISA added CVE-2022-21999 to the Known Exploited Vulnerabilities catalog on March 25, 2022, affecting Microsoft Windows. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2022-21999?
CVE-2022-21999 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-2022-21999?
CVE-2022-21999 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-2022-21999?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-21999, 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-2022-21999

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