CVE-2005-3377: Multiple interpretation error in (1) McAfee Internet Security Suite 7.1.5 version 9.1.08 with the 4.4.00 engin

Routine

MEDIUM 5.1DOWNGRADE

CVE-2005-3377 is a medium-severity flaw (CVSS 5.1) affecting internet security suite. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 applicatio

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.1 (Medium)
EPSS exploit chance	1.3% (top 29%)
CISA exploited list	No
Published	2005-10-30
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: mcafee

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2005-10-30 14:34 UTCPublished CVE record published
2026-06-16 22:16 UTCUpdated Record last modified

mcafee internet security suite DOWNGRADE

Affected: 7.1.5_version_9.1.08_engine_4.4.00 · 8.0.0_patch_10_engine_4400

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.1.5_version_9.1.08_engine_4.4.00

1. Check installed version

apt-cache policy internet-security-suite || rpm -q internet-security-suite || internet-security-suite --version

2. No fixed release: DOWNGRADE to a release before 7.1.5_version_9.1.08_engine_4.4.00 (Debian / Ubuntu)

apt-cache madison internet-security-suite sudo apt install internet-security-suite=<VERSION_BEFORE_7.1.5_version_9.1.08_engine_4.4.00> sudo apt-mark hold internet-security-suite

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list internet-security-suite sudo dnf downgrade internet-security-suite-<VERSION_BEFORE_7.1.5_version_9.1.08_engine_4.4.00> sudo dnf versionlock add internet-security-suite

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2005-3377?

internet security suite: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2005-3377 being exploited?

CVE-2005-3377 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2005-3377 affect?

CVE-2005-3377 affects internet security suite. Severity is medium (CVSS 5.1). 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

How urgent is CVE-2005-3377?

Priority 36/100. No elevated risk signals yet.

Software pages

McAfee vulnerabilities

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References

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