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medium·Network Vulnerabilities·Updated Oct 7, 2025

FileZilla Server < 0.9.6 - DoS via MODE Z Infinite Loop

Est. Time~10 seconds
Scan TypeSingle Scan
Targetsdomain, subdomain, ipv4
CostFree
3.5k
Times Used
continuous scan runs
0
Continuously Checked
assets under CS
0
Vulnerabilities Found
confirmed findings
References
CVECVE-2005-0851
5.0
CVSS

FileZilla FTP server before 0.9.6, when using MODE Z (zlib compression), allows remote attackers to cause a denial of service (infinite loop) via certain file uploads or directory listings.

Attack Vector
-
Privileges Req.
-
User Interaction
-
Affected
n/aby n/a
n/a
Updated Sep 9, 2026View on NVD →

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