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 59× in last 7d / 259× 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 927 total refreshes for this CVE.

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

Related CVEs(same CWE)

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

Explore the affected products and dependency analysis for CVE-2021-22900

Explore →

Is Your Infrastructure Affected by CVE-2021-22900?

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

Start Free Scan →Browse All CVEs