How severe is CVE-2009-0686?

CVE-2009-0686 has a CVSS 2.0 base score of 7.2, rated high severity.

Is CVE-2009-0686 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0686?

CVE-2009-0686 primarily affects Trendmicro Internet Security. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0686?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2009-0686 published?

CVE-2009-0686 was published on 2009-04-01 and last updated on 2026-06-16.

CVE-2009-0686

CVE-2009-0686 is a high-severity vulnerability in Trendmicro Internet Security with a CVSS 2.0 base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Severity: High (CVSS 2.0 base score 7.2)
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Trendmicro Internet Security
Published: 2009-04-01
Last modified: 2026-06-16

Description

The TrendMicro Activity Monitor Module (tmactmon.sys) 2.52.0.1002 in Trend Micro Internet Pro 2008 and 2009, and Security Pro 2008 and 2009, allows local users to gain privileges via a crafted IRP in a METHOD_NEITHER IOCTL request to \Device\tmactmon that overwrites memory.

Frequently asked questions

What is CVE-2009-0686?: The TrendMicro Activity Monitor Module (tmactmon.sys) 2.52.0.1002 in Trend Micro Internet Pro 2008 and 2009, and Security Pro 2008 and 2009, allows local users to gain privileges via a crafted IRP in a METHOD_NEITHER IOCTL request to \Device\tmactmon that overwrites memory.
How severe is CVE-2009-0686?: CVE-2009-0686 has a CVSS 2.0 base score of 7.2, rated high severity.
Is CVE-2009-0686 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0686?: CVE-2009-0686 primarily affects Trendmicro Internet Security. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0686?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2009-0686 published?: CVE-2009-0686 was published on 2009-04-01 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:a:trendmicro:internet_security:2008:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:internet_security:2008:-:pro:*:*:*:*:*
cpe:2.3:a:trendmicro:internet_security:2009:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:internet_security:2009:-:pro:*:*:*:*:*

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