CVE-2006-2538: IE Tab 1.0.9 plugin for Mozilla Firefox 1.5.0.3 allows remote user-assisted attackers to cause a denial of ser

Routine

LOW 2.6DOWNGRADEDOWNGRADE

CVE-2006-2538 is a low-severity flaw (CVSS 2.6) affecting ie tab, firefox. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IE Tab 1.0.9 plugin for Mozilla Firefox 1.5.0.3 allows remote user-assisted attackers to cause a denial of service (application crash), possibly due to a null dereference, via certain Javascript, as demonstrated using a url parameter to the content/reloaded.html page in a chrome:// URI. Some third-party researchers claim that they are unable to reproduce this vulnerability.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	2.6 (Low)
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Published	2006-05-22
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: ie tab · mozilla

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

Am I affected?

Timeline

2006-05-22 23:10 UTCPublished CVE record published
2026-06-16 22:25 UTCUpdated Record last modified

ie tab ie tab DOWNGRADE

Affected: 1.0.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.9

1. Check installed version

apt-cache policy ie-tab || rpm -q ie-tab || ie-tab --version

2. No fixed release: DOWNGRADE to a release before 1.0.9 (Debian / Ubuntu)

apt-cache madison ie-tab sudo apt install ie-tab=<VERSION_BEFORE_1.0.9> sudo apt-mark hold ie-tab

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

dnf --showduplicates list ie-tab sudo dnf downgrade ie-tab-<VERSION_BEFORE_1.0.9> sudo dnf versionlock add ie-tab

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.

mozilla firefox DOWNGRADE

Affected: 1.5.0.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.5.0.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.5.0.3 (Debian / Ubuntu)

apt-cache madison firefox sudo apt install firefox=<VERSION_BEFORE_1.5.0.3> sudo apt-mark hold firefox

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

dnf --showduplicates list firefox sudo dnf downgrade firefox-<VERSION_BEFORE_1.5.0.3> sudo dnf versionlock add firefox

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-2006-2538?

ie tab: downgrade or apply the listed mitigation; firefox: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2006-2538 being exploited?

CVE-2006-2538 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-2006-2538 affect?

CVE-2006-2538 affects ie tab, firefox. Severity is low (CVSS 2.6). IE Tab 1.0.9 plugin for Mozilla Firefox 1.5.0.3 allows remote user-assisted attackers to cause a denial of service (application crash), possibly due to a null dereference, via certain Javascript, as demonstrated using a url parameter to the

How urgent is CVE-2006-2538?

Priority 29/100. No elevated risk signals yet.

Software pages

Google Chrome vulnerabilities · Mozilla Firefox vulnerabilities

References

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