CVE-1999-0450

CVE-1999-0450 is a high-severity vulnerability in Microsoft Internet Information Server with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 19% places it in the 97th percentile, indicating an elevated likelihood of exploitation.

Key facts

Description

In IIS, an attacker could determine a real path using a request for a non-existent URL that would be interpreted by Perl (perl.exe).

Frequently asked questions

What is CVE-1999-0450?
In IIS, an attacker could determine a real path using a request for a non-existent URL that would be interpreted by Perl (perl.exe).
How severe is CVE-1999-0450?
CVE-1999-0450 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-1999-0450 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 19% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0450?
CVE-1999-0450 primarily affects Microsoft Internet Information Server. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0450?
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-1999-0450 published?
CVE-1999-0450 was published on 1999-01-26 and last updated on 2026-06-16.

References

Affected products (4)

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