What’s Vulnerable › Vulnerabilities

CVE-2021-27104: Accellion FTA OS Command Injection Vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2021-11-03
• EPSS: 56.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-02-16 · updated 2026-06-17
• Weakness: CWE-78

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.

Affected products

• Accellion Fta: through 9_12_370

References

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

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