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Vulnerability record · CVE-2000-0770 · published 20 October 2000

CVE-2000-0770: Microsoft internet information server vulnerability

Microsoft · Internet Information Server

IIS 4.0 and 5.0 does not properly restrict access to certain types of files when their parent folders have less restrictive permissions, which could allow remote attackers to bypass access restrictions to some files, aka the "File Permission Canonicalization" vulnerability.

6.4 CVSS 2.0 Medium EPSS 15% · top 3.4%
6.4CVSS 2.0 base score
15%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
4References
16 Jun 2026Last modified by NVD

Description

IIS 4.0 and 5.0 does not properly restrict access to certain types of files when their parent folders have less restrictive permissions, which could allow remote attackers to bypass access restrictions to some files, aka the "File Permission Canonicalization" vulnerability.

AV:N/AC:L/Au:N/C:P/I:P/A:N

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/1565 PatchVendor Advisory
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-057
http://www.securityfocus.com/bid/1565 PatchVendor Advisory
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-057

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2000-0770), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.