VulnerabilityModified

CVE-2006-6564

FileZilla Server before 0.9.22 allows remote attackers to cause a denial of service (crash) via a malformed argument to the STOR command, which results in a NULL pointer dereference.

EXPLOIT ×2 ✓MEDIUM 4.0EPSS 6.07%

Does this matter?

2 public exploits are published in Exploit-DB (verified), so the technical barrier is gone even though the severity is medium and EPSS is 6.1%. Treat it as high on anything reachable from the internet.

Description

FileZilla Server before 0.9.22 allows remote attackers to cause a denial of service (crash) via a malformed argument to the STOR command, which results in a NULL pointer dereference. NOTE: CVE analysis suggests that the problem might be due to a malformed PORT command.

CVSS 2.0: 4.0 MEDIUMAV:N/AC:L/Au:S/C:N/I:N/A:P
EPSS: 6.07% probability · 93th percentile
Public exploits: 2 in Exploit-DB · verified · first 9 December 2006
CISA KEV: Not listed
Affected: filezilla/filezilla
Source: cve@mitre.org

EPSS trend

EPSS 6.1% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Public exploits (2)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-ID	Title	Type	Published	Verified
EDB-2914 source ↗	FileZilla FTP Server 0.9.21 - 'LIST/NLST' Denial of Servicewindows · shinnai	dos	11 December 2006	yes
EDB-2901 source ↗	FileZilla FTP Server 0.9.20b/0.9.21 - 'STOR' Denial of Servicewindows · rgod	dos	9 December 2006	yes

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.