CVE-2006-0765: GUI display truncation vulnerability in ICQ Inc

Routine

MEDIUM 5.1DOWNGRADEDOWNGRADE

CVE-2006-0765 is a medium-severity flaw (CVSS 5.1) affecting icq, icq lite. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

GUI display truncation vulnerability in ICQ Inc. (formerly Mirabilis) ICQ 2003a, 2003b, Lite 4.0, Lite 4.1, and possibly other Windows versions allows user-assisted remote attackers to hide malicious file extensions, bypass Windows security warnings via a filename that is all uppercase and of a specific length, which truncates the malicious extension from the display and could trick a user into executing arbitrary programs.

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	1.2% (top 33%)
CISA exploited list	No
Published	2006-02-18
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: mirabilis

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

Am I affected?

Timeline

2006-02-18 02:02 UTCPublished CVE record published
2026-06-16 22:21 UTCUpdated Record last modified

mirabilis icq DOWNGRADE

Affected: 2003a · 2003b

Fixed in: no fixed release known

Safe to downgrade to: a release before 2003a

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2003a (Debian / Ubuntu)

apt-cache madison icq sudo apt install icq=<VERSION_BEFORE_2003a> sudo apt-mark hold icq

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

dnf --showduplicates list icq sudo dnf downgrade icq-<VERSION_BEFORE_2003a> sudo dnf versionlock add icq

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.

mirabilis icq lite DOWNGRADE

Affected: 4.0 · 4.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0

1. Check installed version

apt-cache policy icq-lite || rpm -q icq-lite || icq-lite --version

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

apt-cache madison icq-lite sudo apt install icq-lite=<VERSION_BEFORE_4.0> sudo apt-mark hold icq-lite

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

dnf --showduplicates list icq-lite sudo dnf downgrade icq-lite-<VERSION_BEFORE_4.0> sudo dnf versionlock add icq-lite

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-2006-0765?

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

Is CVE-2006-0765 being exploited?

CVE-2006-0765 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-2006-0765 affect?

CVE-2006-0765 affects icq, icq lite. Severity is medium (CVSS 5.1). GUI display truncation vulnerability in ICQ Inc. (formerly Mirabilis) ICQ 2003a, 2003b, Lite 4.0, Lite 4.1, and possibly other Windows versions allows user-assisted remote attackers to hide malicious file extensions, bypass Windows security

How urgent is CVE-2006-0765?

Priority 35/100. No elevated risk signals yet.

Software pages

Windows vulnerabilities

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References

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