SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2006-4403

The FTP server in Apple Mac OS X 10.4.8 and earlier, when FTP Access is enabled, will crash when a login failure occurs with a valid user name, which allows remote attackers to cause a denial of service (crash) and enumerate valid usernames.

MEDIUM 4.0EPSS 3.61%

Does this matter?

Lower severity and a low EPSS score (3.61%). Track it; it rarely justifies an emergency change on its own.

Description

The FTP server in Apple Mac OS X 10.4.8 and earlier, when FTP Access is enabled, will crash when a login failure occurs with a valid user name, which allows remote attackers to cause a denial of service (crash) and enumerate valid usernames.

CVSS 2.0
4.0 MEDIUMAV:N/AC:H/Au:N/C:P/I:N/A:P
EPSS
3.61% probability · 89th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Affected
apple/mac os x
Source
cve@mitre.org
EPSS trend
0%3%5%26 October 2026: 3.61%26 October 202626 October 2026

EPSS 3.6% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

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