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 92× in last 7d / 379× 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 1,355 total refreshes for this CVE.

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

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

Explore →

Is Your Infrastructure Affected by CVE-2022-21971?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs