CVE-2007-5633
HIGH · CVSS 7.2EPSS 0.9%EU EUVD
Speedfan.sys in Alfredo Milani Comparetti SpeedFan 4.33, when used on Microsoft Windows Vista x64, allows local users to read or write arbitrary MSRs, and gain privileges and load unsigned drivers, via the (1) IOCTL_RDMSR 0x9C402438 and (2) IOCTL_WRMSR 0x9C40243C IOCTLs to \Device\speedfan, as demonstrated by an IOCTL_WRMSR action on MSR_LSTAR.
Key facts
- CVSS score
- 7.2 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:L/AC:L/Au:N/C:C/I:C/A:C- EPSS score
- 0.9% (61th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2007-5605)
- Published
- October 23, 2007
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2007-5605 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- almico / speedfan
- microsoft / windows vista
References
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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