CVE-2021-27102

Accellion FTA OS Command Injection Vulnerability

n/a

CVSS

3.6%

EPSS (exploit prob.)

88.3%

EPSS percentile

Yes

Actively exploited

Yes

Ransomware use

2021-11-03

Added

MITRE ATT&CK techniques

How this vulnerability maps to adversary behaviour, from the Center for Threat-Informed Defense's public CVE→ATT&CK mappings. Use it to check whether your detections already cover the technique.

Technique	Name	Relationship
T1190	Exploit Public-Facing Application	exploitation technique
T1059	Command and Scripting Interpreter	primary impact
T1005	Data from Local System	secondary impact

Summary

Accellion FTA contains an OS command injection vulnerability exploited via a local web service call.

Affected software

Vendor: Accellion · Product: FTA

Weakness types (CWE):

What to do

This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.

Related vulnerabilities in Accellion

CVE	Name	EPSS	Exploited
CVE-2021-27104	Accellion FTA OS Command Injection Vulnerability	56.4%	Yes
CVE-2021-27103	Accellion FTA Server-Side Request Forgery (SSRF) Vulnerability	11.3%	Yes
CVE-2021-27101	Accellion FTA SQL Injection Vulnerability	6.0%	Yes

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