Kaspersky Antivirus (KAV) 4.0.9.0 does not detect viruses in files with MS-DOS device names in their filenames, which allows local users to bypass virus protection, as demonstrated using aux.vbs and aux.com.
Kaspersky Antivirus (KAV) 4.0.9.0 allows local users to cause a denial of service (CPU consumption or crash) and prevent malicious code from being detected via a file with a long pathname.