CVE-2007-5633

Name: CVE-2007-5633
Creator: NVD / NIST
Published: 2007-10-23T17:46:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.94%

Last modified Jun 16, 2026

CVE-2007-5633 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.94% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

0.94%

56.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Almico	Speedfan	4.33

References

Timeline

Published: Oct 23, 2007
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2007-5633?

How severe is CVE-2007-5633?

Severity scoring for CVE-2007-5633 is pending analysis. The EPSS model estimates a 0.94% probability of exploitation in the next 30 days.

How do I fix CVE-2007-5633?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2007-5633?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST