CVE-2022-21971

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 2022-08-18), 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: 54%CVSS: 7.8Exploit: cisa kev · ssvc active · 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.

Windows Runtime Remote Code Execution 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
54%
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-2022-21971
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-2022-21971

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 88× in last 7d / 371× 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 1,219 total refreshes for this CVE.

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

Publicly available exploits

(3 references)

Working exploit code is in the public domain (3 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCMalwareman007/CVE-2022-21971
    First seen Oct 7, 2022

    POC Of CVE-2022-21971

    Open source ↗
  • GitHub PoCtufanturhan/CVE-2022-21971-Windows-Runtime-RCE
    First seen Apr 15, 2022
    Open source ↗
  • GitHub PoC0vercl0k/CVE-2022-21971
    First seen Feb 26, 2022

    PoC for CVE-2022-21971 "Windows Runtime Remote Code Execution Vulnerability"

    Open source ↗

Frequently asked(6)

What is CVE-2022-21971?
CVE-2022-21971 is a critical vulnerability published on February 9, 2022. Windows Runtime Remote Code Execution Vulnerability
When was CVE-2022-21971 disclosed?
CVE-2022-21971 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-2022-21971 actively exploited?
Yes. CISA added CVE-2022-21971 to the Known Exploited Vulnerabilities catalog on August 18, 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-2022-21971?
CVE-2022-21971 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-2022-21971?
CVE-2022-21971 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-2022-21971?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-21971, 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-2022-21971

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