What is CVE-2020-37067?

CVE-2020-37067 is a critical-severity vulnerability in Utillyty Filetto, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 9.8/10. Published 2026-02-03.

How severe is CVE-2020-37067?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Resource exhaustion in Utillyty Filetto

CVE-2020-37067

Filetto 1.0 FTP server contains a denial of service vulnerability in the FEAT command processing that allows attackers to crash the service. Attackers can send an oversized FEAT command with 11,008 bytes of repeated characters to trigger a buffer overflow and terminate the FTP service.

Published 2026-02-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (31.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Utillyty Filetto — versions 1.0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

www.exploit-db.com/exploits/48503 (exploit)
www.utillyty.eu (product)
sourceforge.net/projects/filetto (product)
www.vulncheck.com/advisories/filetto-feat-denial-of-service (third-party-advisory)

Frequently asked questions

What is CVE-2020-37067?: CVE-2020-37067 is a critical-severity vulnerability in Utillyty Filetto, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 9.8/10. Published 2026-02-03.
How severe is CVE-2020-37067?: Critical severity. CVSS v3 base score is 9.8 out of 10.