CVE-2021-22893

CRITICALNVD 10.010.0—
EchelonGraph scoreHIGH confidence

Score elevated to 10.0 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 10.0 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
10.0
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 47%CVSS: 10.0Exploit: NoneExposed: 0

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

Pulse Connect Secure 9.0R3/9.1R1 and higher is vulnerable to an authentication bypass vulnerability exposed by the Windows File Share Browser and Pulse Secure Collaboration features of Pulse Connect Secure that can allow an unauthenticated user to perform remote arbitrary code execution on the Pulse Connect Secure gateway. This vulnerability has been exploited in the wild.

CVSS v3
10.0
EG Score
10.0(high)
EG Risk
100(Act)
EG Risk 100/100SSVC: Act

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
Severity100% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS
98.7%
KEV
⚠ Exploited

Published

April 23, 2021

Last Modified

December 18, 2025

Advisory Details (4)

Auto-updated Jul 25, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cert, 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-2021-22893
cert🔴 Active Exploitation

VU#213092 - Pulse Connect Secure contains a use-after-free vulnerability

https://www.kb.cert.org/vuls/id/213092
cert🔴 Active Exploitation

VU#213092 - Pulse Connect Secure contains a use-after-free vulnerability

https://kb.cert.org/vuls/id/213092
generic

Pulse Connect Secure Security Update

https://blog.pulsesecure.net/pulse-connect-secure-security-update/

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 39× in last 7d / 215× 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 410 total refreshes for this CVE.

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

Publicly available exploits

(2 references)

Working exploit code is in the public domain (2 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCorangmuda/CVE-2021-22893
    First seen Oct 3, 2021

    Proof On Concept — Pulse Secure CVE-2021-22893

    Open source ↗
  • GitHub PoCZephrFish/CVE-2021-22893_HoneyPoC2
    First seen Apr 21, 2021

    DO NOT RUN THIS.

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2021-22893?
CVE-2021-22893 is a critical vulnerability published on April 23, 2021. Pulse Connect Secure 9.0R3/9.1R1 and higher is vulnerable to an authentication bypass vulnerability exposed by the Windows File Share Browser and Pulse Secure Collaboration features of Pulse Connect Secure that can allow an unauthenticated user to perform remote arbitrary code execution on the…
When was CVE-2021-22893 disclosed?
CVE-2021-22893 was first published in the National Vulnerability Database on April 23, 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-2021-22893 actively exploited?
Yes. CISA added CVE-2021-22893 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-2021-22893?
CVE-2021-22893 has a CVSS v3 base score of 10.0 (NVD).
Which products are affected by CVE-2021-22893?
CVE-2021-22893 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-2021-22893?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-22893, 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-2021-22893

Explore →

Is Your Infrastructure Affected by CVE-2021-22893?

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

Start Free Scan →Browse All CVEs