How severe is CVE-2003-1026?

CVE-2003-1026 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2003-1026 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 39% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2003-1026?

CVE-2003-1026 primarily affects Microsoft Ie. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2003-1026?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2003-1026 published?

CVE-2003-1026 was published on 2004-01-20 and last updated on 2026-06-16.

CVE-2003-1026

CVE-2003-1026 is a critical-severity vulnerability in Microsoft Ie with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 39% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-264.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 39% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Microsoft Ie
Published: 2004-01-20
Last modified: 2026-06-16

Description

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."

Frequently asked questions

What is 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."
How severe is CVE-2003-1026?: CVE-2003-1026 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2003-1026 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 39% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2003-1026?: CVE-2003-1026 primarily affects Microsoft Ie. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2003-1026?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2003-1026 published?: CVE-2003-1026 was published on 2004-01-20 and last updated on 2026-06-16.

References

Affected products (10)

cpe:2.3:a:microsoft:ie:6.0:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:5.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:5.0.1:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:5.0.1:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:5.0.1:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:5.0.1:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:5.5:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:5.5:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:5.5:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:6.0:*:*:*:*:*:*:*

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