CVE-1999-0488

CVE-1999-0488 is a high-severity vulnerability in Microsoft Internet Explorer with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 12% places it in the 96th percentile, indicating an elevated likelihood of exploitation.

Key facts

Description

Internet Explorer 4.0 and 5.0 allows a remote attacker to execute security scripts in a different security context using malicious URLs, a variant of the "cross frame" vulnerability.

Frequently asked questions

What is CVE-1999-0488?
Internet Explorer 4.0 and 5.0 allows a remote attacker to execute security scripts in a different security context using malicious URLs, a variant of the "cross frame" vulnerability.
How severe is CVE-1999-0488?
CVE-1999-0488 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-1999-0488 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0488?
CVE-1999-0488 primarily affects Microsoft Internet Explorer. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0488?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-1999-0488 published?
CVE-1999-0488 was published on 1999-04-21 and last updated on 2026-06-16.

References

Affected products (4)

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