CVE-2025-5551Public exploitNetwork attack vector

Memory corruption via SYSTEM command processing

Published Jun 4, 2025 · Updated Jun 4, 2025

Buffer overflow in the SYSTEM command handler of Freefloat AB Freefloat FTP Server 1.0 allows remote attackers to corrupt process memory. The public record does not identify the affected function, buffer, or memory operation beyond processing of the SYSTEM command. The flaw is reachable without authentication or user interaction and can disrupt the FTP service; the authoritative record does not establish code execution.

CVSS severity9.8
Critical
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in the SYSTEM command handler of Freefloat AB Freefloat FTP Server 1.0 allows remote attackers to corrupt process memory. The public record does not identify the affected function, buffer, or memory operation beyond processing of the SYSTEM command. The flaw is reachable without authentication or user interaction and can disrupt the FTP service; the authoritative record does not establish code execution.

The record

CVE
CVE-2025-5551
Published
Jun 4, 2025
Updated
Jun 4, 2025
Vendor
Freefloat AB
Product
Freefloat FTP Server
Classifications
CWE-119, CWE-120, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Freefloat AB · Freefloat FTP Serverversion=1.0

Published CVSS scores

7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
6.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1210Exploitation of Remote Services

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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