CVE-2005-4840

Name: CVE-2005-4840
Creator: NVD / NIST
Published: 2005-12-31T05:00:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 11.62%

Last modified Jun 16, 2026

CVE-2005-4840 is a vulnerability of currently unknown severity. The Outlook Express Address Book control, when using Internet Explorer 6, allows remote attackers to cause a denial of service (NULL dereference and browser crash) by creating the OutlookExpress.AddressBook COM object, which is not intended for use within Internet Explorer.. EPSS estimates a 11.62% chance of exploitation in the next 30 days.

Description

The Outlook Express Address Book control, when using Internet Explorer 6, allows remote attackers to cause a denial of service (NULL dereference and browser crash) by creating the OutlookExpress.AddressBook COM object, which is not intended for use within Internet Explorer.

Metrics

EPSS Probability

11.62%

95.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Microsoft	Outlook Express Book Control	All versions

References

Timeline

Published: Dec 31, 2005
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2005-4840?

How severe is CVE-2005-4840?

Severity scoring for CVE-2005-4840 is pending analysis. The EPSS model estimates a 11.62% probability of exploitation in the next 30 days.

How do I fix CVE-2005-4840?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2005-4840?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST