CVE-2006-3730: Integer overflow in Microsoft Internet Explorer 6 on Windows XP SP2 allows remote attackers to cause a denial of serv…

Is it exploited?

Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of 29 Oct 2026.

VulnCheck KEV lists it since 10 Oct 2006. It cites 4 public reports, the first from 10 Oct 2006.

• learn.microsoft.com
• archive.f-secure.com
• web.archive.org

How likely is exploitation in the next 30 days?

63.6%

EPSS score, percentile 99.2 of all scored records. A probability estimated by FIRST, not a report of exploitation.

CISA's SSVC assessment in the CVE record lists exploitation as poc.

How severe?

8.8 High

CVSS v3.1 base score, from CISA's enrichment of the record

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (2)

Which versions are affected?

Not stated. The CVE record gives vendor and product as “n/a” and the version as “unspecified”.

Source: CISA KEV 2026.10.29, as of 29 Oct 2026; VulnCheck KEV, as of 30 Oct 2026; FIRST EPSS, as of 29 Oct 2026; CVE List, as of 30 Oct 2026. About the data.

Description

Integer overflow in Microsoft Internet Explorer 6 on Windows XP SP2 allows remote attackers to cause a denial of service (crash) and execute arbitrary code via a 0x7fffffff argument to the setSlice method on a WebViewFolderIcon ActiveX object, which leads to an invalid memory copy.

Source: CVE List, as of 30 Oct 2026. About the data.

What to do

Advisories and patches

• MS06-057 (Vendor advisory)
• SSRT061264 (Vendor advisory)

This summary is based on the CVE record as of 30 Oct 2026. Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

The CVE record does not name affected products or versions: vendor and product are “n/a” and the version is “unspecified”.

Source: CVE List, as of 30 Oct 2026. About the data.

Timeline