What is CVE-2003-1026?

CVE-2003-1026 is a vulnerability in Microsoft Ie, classified under CWE-264. Published 2004-01-20.

Is CVE-2003-1026 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Microsoft Ie

CVE-2003-1026

Internet Explorer 5.01 through 6 SP1 allows remote attackers to bypass zone restrictions via a javascript protocol URL in a sub-frame, which is added to the history list and executed in the top window's zone when the history.back (back) function is called, as demonstrated by BackToFramedJpu, aka the "Travel Log Cross Domain Vulnerability."

Published 2004-01-20 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 9.3 (High). Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.392 (98.6th percentile), scored 2026-10-03.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.392 · newest: 0.392 · change: 0.000

Affected products

Microsoft Ie — versions 6.0
Microsoft Internet Explorer — versions 5.0, 5.0.1, 5.5

Weakness classification (CWE)

CWE-264

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

www.safecenter.net/UMBRELLAWEBV4/BackToFramedJpu
oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:630 (signature, vdb-entry)
www.kb.cert.org/vuls/id/784102 (US Government Resource, Third Party Advisory, third-party-advisory)
oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:689 (signature, vdb-entry)
oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:774 (signature, vdb-entry)
marc.info/ (mailing-list)
oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:687 (signature, vdb-entry)
www.us-cert.gov/cas/techalerts/TA04-033A.html (US Government Resource, third-party-advisory)
oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:805 (signature, vdb-entry)
docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-004 (vendor-advisory)

Frequently asked questions

What is CVE-2003-1026?: CVE-2003-1026 is a vulnerability in Microsoft Ie, classified under CWE-264. Published 2004-01-20.
Is CVE-2003-1026 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.