CVE-2020-37107Public exploit

Client crash via oversized account-field buffer

Published Feb 6, 2026 · Updated Feb 6, 2026

Classic buffer overflow in Core FTP LE 2.2 build 1947 allows local users to crash the client through an oversized account value. The Connect dialog's Advanced pane copies a 20,000-character Account value without enforcing the destination buffer's size. Triggering requires local interaction with the Windows client; the process exits, and subsequent attempts to launch the client fail.

CVSS severity6.7
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Classic buffer overflow in Core FTP LE 2.2 build 1947 allows local users to crash the client through an oversized account value. The Connect dialog's Advanced pane copies a 20,000-character Account value without enforcing the destination buffer's size. Triggering requires local interaction with the Windows client; the process exits, and subsequent attempts to launch the client fail.

The record

CVE
CVE-2020-37107
Published
Feb 6, 2026
Updated
Feb 6, 2026
Vendor
Core FTP
Product
Core FTP LE
Classifications
CWE-120, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.2 build 1947

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Core FTP · Core FTP LEversion=2.2 build 1947

Published CVSS scores

6.7VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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