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Vulnerabilities

Vulnerability · CVE-2004-0839

Microsoft Internet Explorer Arbitrary Program Installation Vulnerability

Published Nov 9, 2004 · catalog updated Nov 9, 2004 · Microsoft Internet Explorer Arbitrary

Patch now

CVE-2004-0839 is in the CISA known-exploited catalog. Confirm Microsoft Internet Explorer Arbitrary against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Microsoft Internet Explorer Arbitrary).
  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
33.99%
Remediation
Remediation guidance
Affected products
vendor avaya ip600_media_servers

Internet Explorer in Windows XP SP2, and other versions including 5.01 and 5.5, allows remote attackers to install arbitrary programs via a web page that uses certain styles and the AnchorClick behavior, popup windows, and drag-and-drop capabilities to drop the program in the local startup folder, as demonstrated by "wottapoop.html".

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor avaya ip600_media_serversversion unspecified

How to fix CVE-2004-0839

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2004-0839 is in the CISA known-exploited catalog. Confirm Microsoft Internet Explorer Arbitrary against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 33.99%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 9, 2004 · VulnCheck KEV

    Detected

    Internet Explorer in Windows XP SP2, and other versions including 5.01 and 5.5, allows remote attackers to install arbitrary programs via a web page that uses certain styles and the AnchorClick behavior, popup windows, and drag-and-drop capabilities to drop the program in the local startup folder, as demonstrated by "wottapoop.html".

  2. Nov 9, 2004 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2004-0839

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2004-0839

    30-day exploitation probability 34.0%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2004-0839

    Internet Explorer in Windows XP SP2, and other versions including 5.01 and 5.5, allows remote attackers to install arbitrary programs via a web page that uses certain styles and the AnchorClick behavior, popup windows, and drag-and-drop capabilities to drop the program in the loc

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.