CVE-2021-22900

CRITICALNVD 7.29.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 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 7.2 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 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: 14%CVSS: 7.2Exploit: cisa kev · ssvc active · epss top5pctExposed: 0

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

A vulnerability allowed multiple unrestricted uploads in Pulse Connect Secure before 9.1R11.4 that could lead to an authenticated administrator to perform a file write via a maliciously crafted archive upload in the administrator web interface.

CVSS v3
7.2
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
14%
EPSS %ILE
96%
KEV
⚠ Exploited

Published

May 27, 2021

Last Modified

December 18, 2025

Advisory Details (1)

Auto-updated Jun 11, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: 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-2021-22900

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 60× in last 7d / 251× 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 718 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2021-22900?
CVE-2021-22900 is a critical vulnerability published on May 27, 2021. A vulnerability allowed multiple unrestricted uploads in Pulse Connect Secure before 9.1R11.4 that could lead to an authenticated administrator to perform a file write via a maliciously crafted archive upload in the administrator web interface.
When was CVE-2021-22900 disclosed?
CVE-2021-22900 was first published in the National Vulnerability Database on May 27, 2021, with the most recent update on December 18, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-22900 actively exploited?
Yes. CISA added CVE-2021-22900 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Ivanti Pulse Connect Secure. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2021-22900?
CVE-2021-22900 has a CVSS v3 base score of 7.2 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2021-22900?
CVE-2021-22900 affects Ivanti Pulse Connect Secure. 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-2021-22900?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-22900, 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

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