CVE-2025-5666: A vulnerability was found in FreeFloat FTP Server 1.0

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HIGH 7.3REMOTEDOWNGRADE

CVE-2025-5666 is a high-severity flaw (CVSS 7.3) affecting freefloat ftp server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in FreeFloat FTP Server 1.0. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component XMKD Command Handler. The manipulation leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-119, CWE-120
Published	2025-06-05
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: freefloat

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-06-05 16:15 UTCPublished CVE record published
2026-06-17 09:48 UTCUpdated Record last modified

freefloat freefloat ftp server DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy freefloat-ftp-server || rpm -q freefloat-ftp-server || freefloat-ftp-server --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison freefloat-ftp-server sudo apt install freefloat-ftp-server=<VERSION_BEFORE_1.0> sudo apt-mark hold freefloat-ftp-server

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list freefloat-ftp-server sudo dnf downgrade freefloat-ftp-server-<VERSION_BEFORE_1.0> sudo dnf versionlock add freefloat-ftp-server

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-5666?

freefloat ftp server: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-5666 being exploited?

CVE-2025-5666 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-5666 affect?

CVE-2025-5666 affects freefloat ftp server. Severity is high (CVSS 7.3). A vulnerability was found in FreeFloat FTP Server 1.0. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component XMKD Command Handler. The manipulation leads to buffer overflow. The attack

How urgent is CVE-2025-5666?

Priority 48/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-5667 HIGH 7.3 DOWNGRADE A vulnerability was found in FreeFloat FTP Server 1.0
CVE-2025-5665 HIGH 7.3 DOWNGRADE A vulnerability was found in FreeFloat FTP Server 1.0
CVE-2025-5664 HIGH 7.3 DOWNGRADE A vulnerability was found in FreeFloat FTP Server 1.0 and classified as critical
CVE-2025-5357 HIGH 7.3 DOWNGRADE A vulnerability was found in FreeFloat FTP Server 1.0
CVE-2025-5356 HIGH 7.3 DOWNGRADE A vulnerability was found in FreeFloat FTP Server 1.0

References

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