How severe is CVE-2008-3865?

CVE-2008-3865 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2008-3865 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-3865?

CVE-2008-3865 primarily affects Trend Micro Internet Security 2007. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-3865?

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

When was CVE-2008-3865 published?

CVE-2008-3865 was published on 2009-01-21 and last updated on 2026-06-16.

CVE-2008-3865

CVE-2008-3865 is a critical-severity vulnerability in Trend Micro Internet Security 2007 with a CVSS 2.0 base score of 10.0. 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-119.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 6% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Trend Micro Internet Security 2007
Published: 2009-01-21
Last modified: 2026-06-16

Description

Multiple heap-based buffer overflows in the ApiThread function in the firewall service (aka TmPfw.exe) in Trend Micro Network Security Component (NSC) modules, as used in Trend Micro OfficeScan 8.0 SP1 Patch 1 and Internet Security 2007 and 2008 17.0.1224, allow remote attackers to execute arbitrary code via a packet with a small value in an unspecified size field.

Frequently asked questions

What is CVE-2008-3865?: Multiple heap-based buffer overflows in the ApiThread function in the firewall service (aka TmPfw.exe) in Trend Micro Network Security Component (NSC) modules, as used in Trend Micro OfficeScan 8.0 SP1 Patch 1 and Internet Security 2007 and 2008 17.0.1224, allow remote attackers to execute arbitrary code via a packet with a small value in an unspecified size field.
How severe is CVE-2008-3865?: CVE-2008-3865 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2008-3865 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-3865?: CVE-2008-3865 primarily affects Trend Micro Internet Security 2007. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-3865?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2008-3865 published?: CVE-2008-3865 was published on 2009-01-21 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:trend_micro:internet_security_2007:*:*:*:*:*:*:*:*
cpe:2.3:a:trend_micro:internet_security_2008:17.0.1224:*:*:*:*:*:*:*
cpe:2.3:a:trend_micro:officescan:8.0:sp1:*:*:*:*:*:*

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