VulnerabilityAnalyzed
CVE-2021-27104
Accellion FTA OS Command Injection Vulnerability
KEVCRITICAL 9.8EPSS 56.7%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 17 November 2021). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 56.69% probability · 99th percentile
- CISA KEV
- Listed 3 November 2021 · due 17 November 2021 · used in ransomware campaigns
- Weakness
- CWE-78
- Affected
- accellion/fta
- Source
- cve@mitre.org
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2021-27104
References
- https://github.com/accellion/CVEs/blob/main/CVE-2021-27104.txtBroken Link, Third Party Advisory
- https://www.accellion.com/products/fta/Product, Vendor Advisory
- https://github.com/accellion/CVEs/blob/main/CVE-2021-27104.txtBroken Link, Third Party Advisory
- https://www.accellion.com/products/fta/Product, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27104US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.