CVE-2006-5874: Clam AntiVirus (ClamAV) 0.88 and earlier allows remote attackers to cause a denial of service (crash) via a ma

Q: How do I fix CVE-2006-5874?

clamav: upgrade to newer than 0.88. Exact commands for each OS are on this page.

Q: Is CVE-2006-5874 being exploited?

CVE-2006-5874 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2006-5874 affect?

CVE-2006-5874 affects clamav. Severity is medium (CVSS 5.0). Clam AntiVirus (ClamAV) 0.88 and earlier allows remote attackers to cause a denial of service (crash) via a malformed base64-encoded MIME attachment that triggers a null pointer dereference.

Q: How urgent is CVE-2006-5874?

Priority 39/100. No elevated risk signals yet.

Routine

MEDIUM 5.0UPGRADE

CVE-2006-5874 is a medium-severity flaw (CVSS 5.0) affecting clamav. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Clam AntiVirus (ClamAV) 0.88 and earlier allows remote attackers to cause a denial of service (crash) via a malformed base64-encoded MIME attachment that triggers a null pointer dereference.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.7% (top 14%)
CISA exploited list	No
Published	2006-12-10
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: clam anti-virus

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

Am I affected?

Timeline

2006-12-10 02:28 UTCPublished CVE record published
2026-06-16 22:32 UTCUpdated Record last modified

clam anti-virus clamav UPGRADE

Affected: <= 0.88 · . · 0.80 · 0.80_rc1 · 0.80_rc2 · 0.80_rc3 · 0.80_rc4 · 0.81

Fixed in: newer than 0.88

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy clamav || rpm -q clamav || clamav --version

2. UPGRADE to newer than 0.88 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade clamav

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade clamav

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2006-5874?

clamav: upgrade to newer than 0.88. Exact commands for each OS are on this page.

Is CVE-2006-5874 being exploited?

CVE-2006-5874 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-2006-5874 affect?

CVE-2006-5874 affects clamav. Severity is medium (CVSS 5.0). Clam AntiVirus (ClamAV) 0.88 and earlier allows remote attackers to cause a denial of service (crash) via a malformed base64-encoded MIME attachment that triggers a null pointer dereference.

How urgent is CVE-2006-5874?

Priority 39/100. No elevated risk signals yet.

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References

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