CVE-2021-22894

HIGHNVD 8.89.0▲
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 8.8 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
8.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 41%CVSS: 8.8Exploit: NoneExposed: 0

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

A buffer overflow vulnerability exists in Pulse Connect Secure before 9.1R11.4 allows a remote authenticated attacker to execute arbitrary code as the root user via maliciously crafted meeting room.

CVSS v3
8.8
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
98.5%
KEV
⚠ Exploited

Published

May 27, 2021

Last Modified

December 18, 2025

Advisory Details (1)

Auto-updated Jun 2, 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-2021-22894

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 52× in last 7d / 235× 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 434 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2021-22894?
CVE-2021-22894 is a high vulnerability published on May 27, 2021. A buffer overflow vulnerability exists in Pulse Connect Secure before 9.1R11.4 allows a remote authenticated attacker to execute arbitrary code as the root user via maliciously crafted meeting room.
When was CVE-2021-22894 disclosed?
CVE-2021-22894 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-2021-22894 actively exploited?
Yes. CISA added CVE-2021-22894 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-2021-22894?
CVE-2021-22894 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2021-22894?
CVE-2021-22894 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-2021-22894?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-22894, 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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