CVE-2007-5633

What it is

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.

At a glance

Exploitability

Can be exploited locally on the machine without logging in. High risk of data exposure, data tampering, service disruption.

Exploit odds

0.9% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2007-10-23 17:46 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 22:46 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.9% in the next 30 days (EPSS).
• Severity: 7.2 HIGH (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2007-10-23 17:46 UTC

Last modified

2026-06-16 22:46 UTC

Exploit probability

0.9% · EPSS, next 30 days

Record status

Modified

Affected

• Almico Speedfan 4.33

Attack profile CVSS 2.0 · 7.2

Attack vector

Local

Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2007-5633.md and follow it. Check whether this project is affected by CVE-2007-5633. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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