CVE-2005-3499: Frisk F-Prot Antivirus allows remote attackers to bypass protection via a ZIP file with a version header great

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HIGH 7.5DOWNGRADE

CVE-2005-3499 is a high-severity flaw (CVSS 7.5) affecting f-prot antivirus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Frisk F-Prot Antivirus allows remote attackers to bypass protection via a ZIP file with a version header greater than 15, which prevents F-Prot from decompressing and analyzing the file.

Why this priority

High severity

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	3.3% (top 11%)
CISA exploited list	No
Published	2005-11-04
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: frisk software

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

Am I affected?

Timeline

2005-11-04 00:02 UTCPublished CVE record published
2026-06-16 22:17 UTCUpdated Record last modified

frisk software f-prot antivirus DOWNGRADE

Affected: all versions · 3.12b · 3.12d · 3.16c · 4.4.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.12b

1. Check installed version

apt-cache policy f-prot-antivirus || rpm -q f-prot-antivirus || f-prot-antivirus --version

2. No fixed release: DOWNGRADE to a release before 3.12b (Debian / Ubuntu)

apt-cache madison f-prot-antivirus sudo apt install f-prot-antivirus=<VERSION_BEFORE_3.12b> sudo apt-mark hold f-prot-antivirus

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

dnf --showduplicates list f-prot-antivirus sudo dnf downgrade f-prot-antivirus-<VERSION_BEFORE_3.12b> sudo dnf versionlock add f-prot-antivirus

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-2005-3499?

f-prot antivirus: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2005-3499 being exploited?

CVE-2005-3499 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-2005-3499 affect?

CVE-2005-3499 affects f-prot antivirus. Severity is high (CVSS 7.5). Frisk F-Prot Antivirus allows remote attackers to bypass protection via a ZIP file with a version header greater than 15, which prevents F-Prot from decompressing and analyzing the file.

How urgent is CVE-2005-3499?

Priority 48/100. High severity

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References

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