CVE-2021-27102

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 2021-11-03), 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 — 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: 4%CVSS: 7.8Exploit: cisa kev · ssvc active · kev ransomwareExposed: 0

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

Accellion FTA 9_12_411 and earlier is affected by OS command execution via a local web service call. The fixed version is FTA_9_12_416 and later.

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
4%
EPSS %ILE
89%
KEV
⚠ Exploited

Published

February 16, 2021

Last Modified

November 3, 2025

Advisory Details (1)

Auto-updated Jun 3, 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-2021-27102

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 63× in last 7d / 273× 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 1,041 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2021-27102?
CVE-2021-27102 is a critical vulnerability published on February 16, 2021. Accellion FTA 912411 and earlier is affected by OS command execution via a local web service call. The fixed version is FTA912_416 and later.
When was CVE-2021-27102 disclosed?
CVE-2021-27102 was first published in the National Vulnerability Database on February 16, 2021, with the most recent update on November 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-27102 actively exploited?
Yes. CISA added CVE-2021-27102 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Accellion FTA. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2021-27102?
CVE-2021-27102 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-2021-27102?
CVE-2021-27102 affects Accellion FTA. 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-2021-27102?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-27102, 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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