CVE-2006-2403: Buffer overflow in FileZilla before 2.2.23 allows remote attackers to execute arbitrary commands via unknown a

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HIGH 7.5DOWNGRADE

CVE-2006-2403 is a high-severity flaw (CVSS 7.5) affecting filezilla. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in FileZilla before 2.2.23 allows remote attackers to execute arbitrary commands via unknown attack vectors.

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	2.5% (top 15%)
CISA exploited list	No
Published	2006-05-16
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: filezilla

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

Am I affected?

Timeline

2006-05-16 01:02 UTCPublished CVE record published
2026-06-16 22:24 UTCUpdated Record last modified

filezilla filezilla DOWNGRADE

Affected: 2.2.14b · 2.2.15 · 2.2.22

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.2.14b

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.2.14b (Debian / Ubuntu)

apt-cache madison filezilla sudo apt install filezilla=<VERSION_BEFORE_2.2.14b> sudo apt-mark hold filezilla

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

dnf --showduplicates list filezilla sudo dnf downgrade filezilla-<VERSION_BEFORE_2.2.14b> sudo dnf versionlock add filezilla

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-2006-2403?

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

Is CVE-2006-2403 being exploited?

CVE-2006-2403 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-2006-2403 affect?

CVE-2006-2403 affects filezilla. Severity is high (CVSS 7.5). Buffer overflow in FileZilla before 2.2.23 allows remote attackers to execute arbitrary commands via unknown attack vectors.

How urgent is CVE-2006-2403?

Priority 47/100. High severity

Software pages

FileZilla vulnerabilities

Related CVEs

CVE-2007-2318 HIGH 9.3 UPGRADE Multiple format string vulnerabilities in FileZilla before 2.2.32 allow remote attackers to execute arbitrary
CVE-2007-0317 HIGH 7.5 UPGRADE Format string vulnerability in the LogMessage function in FileZilla before 3.0.0-beta5 allows remote attackers
CVE-2007-0315 HIGH 9.3 UPGRADE Multiple buffer overflows in FileZilla before 2.2.30a allow remote attackers to execute arbitrary code or caus
CVE-2006-6564 MEDIUM 4.0 UPGRADE FileZilla Server before 0.9.22 allows remote attackers to cause a denial of service (crash) via a malformed ar
CVE-2005-2898 MEDIUM 4.6 DOWNGRADE NOTE: this issue has been disputed by the vendor

References

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