What is CVE-2015-2856?

CVE-2015-2856 is a high-severity vulnerability in Accellion File Transfer Appliance, classified under Path Traversal. CVSS score: 7.5/10. Published 2017-10-10.

How severe is CVE-2015-2856?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2015-2856 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Path Traversal in Accellion File Transfer Appliance

CVE-2015-2856

Directory traversal vulnerability in the template function in function.inc in Accellion File Transfer Appliance devices before FTA_9_11_210 allows remote attackers to read arbitrary files via a .. (dot dot) in the statecode cookie.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2017-10-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.566 (99.1th percentile), scored 2026-10-18.

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.566 · newest: 0.566 · change: 0.000

Affected products

Accellion File Transfer Appliance

Weakness classification (CWE)

CWE-22 — Path Traversal

Public proof-of-concept exploits

rapid7/metasploit-framework

References

www.rapid7.com/db/modules/auxiliary/scanner/http/accellion_fta_statecode_file_r… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2015-2856?: CVE-2015-2856 is a high-severity vulnerability in Accellion File Transfer Appliance, classified under Path Traversal. CVSS score: 7.5/10. Published 2017-10-10.
How severe is CVE-2015-2856?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2015-2856 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.