How severe is CVE-2005-3377?

CVE-2005-3377 has a CVSS 2.0 base score of 5.1, rated medium severity.

Is CVE-2005-3377 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2005-3377?

CVE-2005-3377 primarily affects Mcafee Internet Security Suite. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2005-3377?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2005-3377 published?

CVE-2005-3377 was published on 2005-10-30 and last updated on 2026-06-16.

CVE-2005-3377

CVE-2005-3377 is a medium-severity vulnerability in Mcafee Internet Security Suite with a CVSS 2.0 base score of 5.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.1)
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Mcafee Internet Security Suite
Published: 2005-10-30
Last modified: 2026-06-16

Description

Multiple interpretation error in (1) McAfee Internet Security Suite 7.1.5 version 9.1.08 with the 4.4.00 engine and (2) McAfee Corporate 8.0.0 patch 10 with the 4400 engine allows remote attackers to bypass virus scanning via a file such as BAT, HTML, and EML with an "MZ" magic byte sequence which is normally associated with EXE, which causes the file to be treated as a safe type that could still be executed as a dangerous file type by applications on the end system, as demonstrated by a "triple headed" program that contains EXE, EML, and HTML content, aka the "magic byte bug."

Frequently asked questions

What is CVE-2005-3377?: Multiple interpretation error in (1) McAfee Internet Security Suite 7.1.5 version 9.1.08 with the 4.4.00 engine and (2) McAfee Corporate 8.0.0 patch 10 with the 4400 engine allows remote attackers to bypass virus scanning via a file such as BAT, HTML, and EML with an "MZ" magic byte sequence which is normally associated with EXE, which causes the file to be treated as a safe type that could still be executed as a dangerous file type by applications on the end system, as demonstrated by a "triple headed" program that contains EXE, EML, and HTML content, aka the "magic byte bug."
How severe is CVE-2005-3377?: CVE-2005-3377 has a CVSS 2.0 base score of 5.1, rated medium severity.
Is CVE-2005-3377 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-3377?: CVE-2005-3377 primarily affects Mcafee Internet Security Suite. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-3377?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2005-3377 published?: CVE-2005-3377 was published on 2005-10-30 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:mcafee:internet_security_suite:7.1.5_version_9.1.08_engine_4.4.00:*:*:*:*:*:*:*
cpe:2.3:a:mcafee:internet_security_suite:8.0.0_patch_10_engine_4400:*:*:*:*:*:*:*

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