Mail in Apple Mac OS X before 10.6.3 does not disable the filter rules associated with a deleted mail account, which has unspecified impact and attack vectors.
http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html
Source: MITRE
Published: 2010-03-30
Updated: 2010-03-31
Type: NVD-CWE-noinfo
Base Score: 10
Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Impact Score: 10
Exploitability Score: 10
Severity: HIGH