CVE-2008-7135: toolbaru.dll in ICQ Toolbar (ICQToolbar) 2.3 allows remote attackers to cause a denial of service (toolbar cra

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MEDIUM 4.3DOWNGRADE

CVE-2008-7135 is a medium-severity flaw (CVSS 4.3) affecting icq toolbar. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

toolbaru.dll in ICQ Toolbar (ICQToolbar) 2.3 allows remote attackers to cause a denial of service (toolbar crash) via a long argument to the IsChecked method, a different vector than CVE-2008-7136.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-20
Published	2009-09-01
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: icq

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

Am I affected?

Timeline

2009-09-01 16:30 UTCPublished CVE record published
2026-06-16 23:03 UTCUpdated Record last modified

icq icq toolbar DOWNGRADE

Affected: 2.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.3 (Debian / Ubuntu)

apt-cache madison icq-toolbar sudo apt install icq-toolbar=<VERSION_BEFORE_2.3> sudo apt-mark hold icq-toolbar

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

dnf --showduplicates list icq-toolbar sudo dnf downgrade icq-toolbar-<VERSION_BEFORE_2.3> sudo dnf versionlock add icq-toolbar

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: ICQ Toolbar 2.3 - ActiveX Remote Denial of Service

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-2008-7135?

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

Is CVE-2008-7135 being exploited?

CVE-2008-7135 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-2008-7135 affect?

CVE-2008-7135 affects icq toolbar. Severity is medium (CVSS 4.3). toolbaru.dll in ICQ Toolbar (ICQToolbar) 2.3 allows remote attackers to cause a denial of service (toolbar crash) via a long argument to the IsChecked method, a different vector than CVE-2008-7136.

How urgent is CVE-2008-7135?

Priority 41/100. Public exploit reference

Related CVEs

CVE-2008-7136 MEDIUM 4.3 DOWNGRADE toolbaru.dll in ICQ Toolbar (ICQToolbar) 2.3 allows remote attackers to cause a denial of service (toolbar cra
CVE-2006-4661 LOW 2.6 DOWNGRADE AOL ICQ Toolbar 1.3 for Internet Explorer (toolbaru.dll) does not properly validate the origin of the configur
CVE-2006-4660 MEDIUM 5.8 DOWNGRADE Multiple cross-site scripting (XSS) vulnerabilities in the RSS Feed module in AOL ICQ Toolbar 1.3 for Internet

References

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