CVE-2007-5634 — 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

Back Back to CVE browser

MEDIUM

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

Published Oct 23, 2007

4.9

MEDIUM

CVSS 2.0

EPSS 0.39%

Description

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

Remediation

No remediation recorded yet.

Metrics

0.39% 0.00394

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.00394

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (9 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	0.39% (0.00394)	31.14th	v5 (v2026.06.15)
Jun 15, 2026	0.39% (0.00394)	30.92th	v5 (v2026.06.15)
Mar 17, 2025	0.05% (0.00050)	12.58th	v4 (v2025.03.14)
Dec 12, 2024	0.04% (0.00042)	5.07th	v3 (v2023.03.01)
Mar 7, 2023	0.04% (0.00042)	5.63th	v3 (v2023.03.01)
Mar 6, 2023	0.89% (0.00890)	30.33th	v2 (v2022.01.01)
Sep 10, 2022	0.89% (0.00890)	28.64th	v2 (v2022.01.01)
Apr 1, 2022	0.89% (0.00890)	26.62th	v2 (v2022.01.01)
Feb 4, 2022	0.89% (0.00890)	12.04th	v2 (v2022.01.01)

Weaknesses (1)

CWE-119

Buffer Overflow

References (3)

http://secunia.com/advisories/27312
third-party-advisoryx_refsource_SECUNIA
http://www.bugtrack.almico.com/view.php?id=987
x_refsource_MISCExploit
https://exchange.xforce.ibmcloud.com/vulnerabilities/37299
vdb-entryx_refsource_XF

Link	Providers	Tags
http://secunia.com/advisories/27312		third-party-advisoryx_refsource_SECUNIA
http://www.bugtrack.almico.com/view.php?id=987		x_refsource_MISCExploit
https://exchange.xforce.ibmcloud.com/vulnerabilities/37299		vdb-entryx_refsource_XF

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Oct 23, 2007

Updated Aug 7, 2024

Reserved Oct 23, 2007

Link CVE-2007-5634

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2007-5634

Red Hat

Severity n/a

Public date n/a

Links CVE-2007-5634