How severe is CVE-2020-37067?

CVE-2020-37067 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-37067 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2020-37067?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2020-37067 have an EU (EUVD) identifier?

Yes. CVE-2020-37067 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-30998.

When was CVE-2020-37067 published?

CVE-2020-37067 was published on 2026-02-03 and last updated on 2026-06-17.

CVE-2020-37067

CVE-2020-37067 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 7.1
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2020-30998
Weakness: CWE-770
Published: 2026-02-03
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2020-37067?: CVE-2020-37067 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-37067 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2020-37067?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2020-37067 have an EU (EUVD) identifier?: Yes. CVE-2020-37067 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-30998.
When was CVE-2020-37067 published?: CVE-2020-37067 was published on 2026-02-03 and last updated on 2026-06-17.

References

Other CWE-770 (Allocation of Resources Without Limits or Throttling) vulnerabilities

CVE-2026-31283 — Critical (CVSS 9.8): In Totara LMS v19.1.5 and before, the forgot password API does not implement rate limiting for the target email…
CVE-2021-47875 — Critical (CVSS 9.8): GeoGebra CAS Calculator 6.0.631.0 contains a denial of service vulnerability that allows attackers to crash the…
CVE-2025-11832 — Critical (CVSS 9.8): Allocation of Resources Without Limits or Throttling vulnerability in Azure Access Technology BLU-IC2, Azure Access…
CVE-2024-44241 — Critical (CVSS 9.8): The issue was addressed with improved bounds checks. This issue is fixed in iOS 18.1 and iPadOS 18.1, macOS Sequoia…
CVE-2022-3439 — Critical (CVSS 9.8): Allocation of Resources Without Limits or Throttling in GitHub repository ikus060/rdiffweb prior to 2.5.0.
CVE-2022-3456 — Critical (CVSS 9.8): Allocation of Resources Without Limits or Throttling in GitHub repository ikus060/rdiffweb prior to 2.5.0.

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