CVE-2007-5634: Almico Speedfan

Medium severity, CVSS 4.9. EPSS: 0.4% chance of exploitation in the next 30 days.

Speedfan.sys in Alfredo Milani Comparetti SpeedFan 4.33, when used on Microsoft Windows Vista x64, does not properly check a buffer during an IOCTL 0x9c402420 call, which allows local users to cause a denial of service (machine crash) and possibly gain privileges via unspecified vectors.

Affected products

• Almico Speedfan: version 4.33 only

Published 2007-10-23. Last modified 2026-06-16.