CVE-2001-0506

CVE-2001-0506 is a high-severity vulnerability in Microsoft Internet Information Server with a CVSS 2.0 base score of 7.2. Its EPSS exploit-prediction score of 69% places it in the 99th percentile, indicating an elevated likelihood of exploitation.

Key facts

Description

Buffer overflow in ssinc.dll in IIS 5.0 and 4.0 allows local users to gain system privileges via a Server-Side Includes (SSI) directive for a long filename, which triggers the overflow when the directory name is added, aka the "SSI privilege elevation" vulnerability.

Frequently asked questions

What is CVE-2001-0506?
Buffer overflow in ssinc.dll in IIS 5.0 and 4.0 allows local users to gain system privileges via a Server-Side Includes (SSI) directive for a long filename, which triggers the overflow when the directory name is added, aka the "SSI privilege elevation" vulnerability.
How severe is CVE-2001-0506?
CVE-2001-0506 has a CVSS 2.0 base score of 7.2, rated high severity.
Is CVE-2001-0506 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 69% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-0506?
CVE-2001-0506 primarily affects Microsoft Internet Information Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2001-0506?
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-2001-0506 published?
CVE-2001-0506 was published on 2001-09-20 and last updated on 2026-06-16.

References

Affected products (2)

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