Reference page — cumulative record through Tuesday, October 6, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2021-27104

CVE-2021-27104CRITICAL

n/a n/a — Accellion FTA

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .5669   99.0   YES

AFFECTED
  Product  Versions  Fixed
  n/a      n/a –     —

TIMELINE
  Feb 10  Reserved by mitre
  Feb 16  Published (CNA: mitre)
  Nov 3   Added to CISA KEV, remediation due 2021-11-17

CWE-78 · CNA: mitre · CVSS v3.1 · 3 references · KEV due November 17, 2021

Description

Accellion FTA 9_12_370 and earlier is affected by OS command execution via a crafted POST request to various admin endpoints. The fixed version is FTA_9_12_380 and later.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
February 10, 2021	Reserved	Reserved by mitre
February 16, 2021	Published	Published (CNA: mitre)
November 3, 2021	KEV ADDED	Added to CISA KEV, remediation due 2021-11-17

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	n/a	—	n/a	—

Weaknesses

CWE-78

References (3)

https://github.com/accellion/CVEs/blob/main/CVE-2021-27104.txt [x_refsource_MISC]
https://www.accellion.com/products/fta/ [x_refsource_MISC]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27104 [government-resource]

Authoritative record: CVE-2021-27104 at cve.org

Weaknesses: CWE-78

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-27104 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Tuesday, October 6, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.