How severe is CVE-2008-5666?

CVE-2008-5666 has a CVSS 2.0 base score of 3.5, rated low severity.

Is CVE-2008-5666 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-5666?

CVE-2008-5666 affects Wftpserver Winftp Ftp Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2008-5666?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2008-5666 published?

CVE-2008-5666 was published on 2008-12-19 and last updated on 2026-06-16.

CVE-2008-5666

CVE-2008-5666 is a low-severity vulnerability in Wftpserver Winftp Ftp Server with a CVSS 2.0 base score of 3.5. Its EPSS exploit-prediction score of 21% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-399.

Key facts

Severity: Low (CVSS 2.0 base score 3.5)
EPSS exploit prediction: 21% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Wftpserver Winftp Ftp Server
Published: 2008-12-19
Last modified: 2026-06-16

Description

WinFTP FTP Server 2.3.0, when passive (aka PASV) mode is used, allows remote authenticated users to cause a denial of service via a sequence of FTP sessions that include an invalid "NLST -1" command.

Frequently asked questions

What is CVE-2008-5666?: WinFTP FTP Server 2.3.0, when passive (aka PASV) mode is used, allows remote authenticated users to cause a denial of service via a sequence of FTP sessions that include an invalid "NLST -1" command.
How severe is CVE-2008-5666?: CVE-2008-5666 has a CVSS 2.0 base score of 3.5, rated low severity.
Is CVE-2008-5666 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-5666?: CVE-2008-5666 affects Wftpserver Winftp Ftp Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2008-5666?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-5666 published?: CVE-2008-5666 was published on 2008-12-19 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:wftpserver:winftp_ftp_server:2.3.0:*:*:*:*:*:*:*

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