CVE-2024-0693Public exploitNetwork attack vector

Service interruption via crafted FTP username

Published Jan 18, 2024 · Updated Jun 2, 2025

Denial of service in EFS Easy File Sharing FTP Server 2.0 allows remote attackers to interrupt the FTP service via a crafted username. Public records identify the username argument but do not disclose the malformed value or exact resource mishandled by the FTP login path. No credentials or user interaction are required, and successful exploitation halts the service without reported data exposure.

CVSS severity7.5
High
EPSS probability1.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in EFS Easy File Sharing FTP Server 2.0 allows remote attackers to interrupt the FTP service via a crafted username. Public records identify the username argument but do not disclose the malformed value or exact resource mishandled by the FTP login path. No credentials or user interaction are required, and successful exploitation halts the service without reported data exposure.

The record

CVE
CVE-2024-0693
Published
Jan 18, 2024
Updated
Jun 2, 2025
Vendor
EFS Software, Inc.
Product
Easy File Sharing FTP Server
Classifications
CWE-404, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 2, 2025Record 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=2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

EFS Software, Inc. · Easy File Sharing FTP Serverversion=2.0

Published CVSS scores

5.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
5.0VulDBAV:N/AC:L/Au:N/C:N/I:N/A:P
5.3VulDBCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
7.5NIST NVDCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-404Improper Resource Shutdown or Release
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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