CVE-2006-2161: Buffer overflow in (1) TZipBuilder 1.79.03.01, (2) Abakt 0.9.2 and 0.9.3-beta1, (3) CAM UnZip 4.0 and 4.3, and

This month

MEDIUM 5.1DOWNGRADEDOWNGRADEDOWNGRADE

CVE-2006-2161 is a medium-severity flaw (CVSS 5.1) affecting cam unzip, abakt, tzipbuilder. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in (1) TZipBuilder 1.79.03.01, (2) Abakt 0.9.2 and 0.9.3-beta1, (3) CAM UnZip 4.0 and 4.3, and possibly other products, allows user-assisted attackers to execute arbitrary code via a ZIP archive that contains a file with a long file name.

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	3.6% (top 11%)
CISA exploited list	No
Published	2006-05-09
Last modified	2026-06-16

Publisher (CNA): Flexera Software LLC · Vendor: cam development · erik dienske · roger aelbrecht

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

Am I affected?

Timeline

2006-05-09 10:02 UTCPublished CVE record published
2026-06-16 22:24 UTCUpdated Record last modified

cam development cam unzip DOWNGRADE

Affected: 4.0 · 4.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0

1. Check installed version

apt-cache policy cam-unzip || rpm -q cam-unzip || cam-unzip --version

2. No fixed release: DOWNGRADE to a release before 4.0 (Debian / Ubuntu)

apt-cache madison cam-unzip sudo apt install cam-unzip=<VERSION_BEFORE_4.0> sudo apt-mark hold cam-unzip

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

dnf --showduplicates list cam-unzip sudo dnf downgrade cam-unzip-<VERSION_BEFORE_4.0> sudo dnf versionlock add cam-unzip

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.

erik dienske abakt DOWNGRADE

Affected: 0.9.2 · 0.9.3_beta1

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.9.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.9.2 (Debian / Ubuntu)

apt-cache madison abakt sudo apt install abakt=<VERSION_BEFORE_0.9.2> sudo apt-mark hold abakt

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

dnf --showduplicates list abakt sudo dnf downgrade abakt-<VERSION_BEFORE_0.9.2> sudo dnf versionlock add abakt

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.

roger aelbrecht tzipbuilder DOWNGRADE

Affected: 1.79.03.01

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.79.03.01

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.79.03.01 (Debian / Ubuntu)

apt-cache madison tzipbuilder sudo apt install tzipbuilder=<VERSION_BEFORE_1.79.03.01> sudo apt-mark hold tzipbuilder

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

dnf --showduplicates list tzipbuilder sudo dnf downgrade tzipbuilder-<VERSION_BEFORE_1.79.03.01> sudo dnf versionlock add tzipbuilder

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-2006-2161?

cam unzip: downgrade or apply the listed mitigation; abakt: downgrade or apply the listed mitigation; tzipbuilder: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2006-2161 being exploited?

CVE-2006-2161 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-2006-2161 affect?

CVE-2006-2161 affects cam unzip, abakt, tzipbuilder. Severity is medium (CVSS 5.1). Buffer overflow in (1) TZipBuilder 1.79.03.01, (2) Abakt 0.9.2 and 0.9.3-beta1, (3) CAM UnZip 4.0 and 4.3, and possibly other products, allows user-assisted attackers to execute arbitrary code via a ZIP archive that contains a file with a l

How urgent is CVE-2006-2161?

Priority 40/100. No elevated risk signals yet.

References

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