Home/CVE/Accellion FTA OS Command Injection Vulnerability
CVE

CVE-2021-27102

Accellion FTA OS Command Injection Vulnerability

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.

HIGH · CVSS 7.8 ⚠ CISA KEV EPSS 0.00246 Ransomware: known
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • Linked to known ransomware campaigns
  • SSVC exploitation status: active
  • CVSS base score ≥ 7.0
Sigma rules10 YARA rules0
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Required Remediation

Apply updates per vendor instructions.

◆

Threat Actors Linked

2
actorCl0p
actorTA505
⬡

Weakness Classification

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
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Affected Products & Versions

1
accellion fta<= 9_12_411
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Sigma Hunt Rules

10
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
relatedcriticalAntivirus Exploitation Framework Detection
relatedcriticalAntivirus Password Dumper Detection
relatedcriticalAntivirus Ransomware Detection
relatedcriticalWebshell Remote Command Execution
relatedcriticalCobalt Strike DNS Beaconing
relatedcriticalBad Opsec Powershell Code Artifacts
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Scoring & Timeline

7.8
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD16 Feb 2021 · 09:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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Vendor Advisories

1
cisaKEV-CVE-2021-27102
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/accellion/CVEs/blob/main/CVE-2021-27102.txtBroken LinkThird Party Advisory
https://www.accellion.com/products/fta/ProductVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27102US Government Resource
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