CVE-2007-6536: The Custom Button Installer dialog in Google Toolbar 4 and 5 beta presents certain domain names in the (1) "Do

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MEDIUM 6.8DOWNGRADE

CVE-2007-6536 is a medium-severity flaw (CVSS 6.8) affecting toolbar. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Custom Button Installer dialog in Google Toolbar 4 and 5 beta presents certain domain names in the (1) "Downloaded from" and (2) "Privacy considerations" sections without verifying domain names, which makes it easier for remote attackers to spoof domain names and trick users into installing malicious button XML files, as demonstrated by presenting www.google.com when the button was downloaded from an arbitrary site through an open redirector

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	1.3% (top 31%)
CISA exploited list	No
Weakness	CWE-200
Published	2007-12-27
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: google

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

Am I affected?

Timeline

2007-12-27 23:46 UTCPublished CVE record published
2026-06-16 22:48 UTCUpdated Record last modified

google toolbar DOWNGRADE

Affected: 4 · 5 beta

Fixed in: no fixed release known

Safe to downgrade to: a release before 4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4 (Debian / Ubuntu)

apt-cache madison toolbar sudo apt install toolbar=<VERSION_BEFORE_4> sudo apt-mark hold toolbar

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

dnf --showduplicates list toolbar sudo dnf downgrade toolbar-<VERSION_BEFORE_4> sudo dnf versionlock add 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.

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-2007-6536?

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

Is CVE-2007-6536 being exploited?

CVE-2007-6536 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-2007-6536 affect?

CVE-2007-6536 affects toolbar. Severity is medium (CVSS 6.8). The Custom Button Installer dialog in Google Toolbar 4 and 5 beta presents certain domain names in the (1) "Downloaded from" and (2) "Privacy considerations" sections without verifying domain names, which makes it easier for remote attacker

How urgent is CVE-2007-6536?

Priority 46/100. Public exploit reference

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References

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