Applied Cybernetics Group
Threat intel → detection pipeline
Tuesday, July 14, 2026
Data as of 20:11 UTC

known ransomware use

Accellion FTA OS Command Injection Vulnerability

Added to KEV
2021-11-03
Federal due date
2021-11-17
Vendor
Accellion
Product
FTA
EPSS
98.9th percentile (score 0.564, as of 2026-07-13)
NVD CVSS v3.1
Ransomware use
Known
ATT&CK
T1005 , T1059 , T1190 · signal rollup
Upstream
https://nvd.nist.gov/vuln/detail/CVE-2021-27104

CISA short description

Accellion FTA contains an OS command injection vulnerability exploited via a crafted POST request to various admin endpoints.

Required action

Apply updates per vendor instructions.

EPSS percentile is the FIRST.org exploit-probability ranking as of the date noted above; it moves daily. CVSS reflects NVD's analysis at time of publication.