How severe is CVE-2000-0770?

CVE-2000-0770 has a CVSS 2.0 base score of 6.4, rated medium severity.

Is CVE-2000-0770 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2000-0770?

CVE-2000-0770 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-2000-0770?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2000-0770 published?

CVE-2000-0770 was published on 2000-10-20 and last updated on 2026-06-16.

CVE-2000-0770

CVE-2000-0770 is a medium-severity vulnerability in Microsoft Internet Information Server with a CVSS 2.0 base score of 6.4. Its EPSS exploit-prediction score of 15% places it in the 96th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Medium (CVSS 2.0 base score 6.4)
EPSS exploit prediction: 15% (96th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Internet Information Server
Published: 2000-10-20
Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2000-0770?: 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.
How severe is CVE-2000-0770?: CVE-2000-0770 has a CVSS 2.0 base score of 6.4, rated medium severity.
Is CVE-2000-0770 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2000-0770?: CVE-2000-0770 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-2000-0770?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2000-0770 published?: CVE-2000-0770 was published on 2000-10-20 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:microsoft:internet_information_server:4.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_information_services:5.0:*:*:*:*:*:*:*

More vulnerabilities in Microsoft Internet Information Server

CVE-2008-0075 — Critical (CVSS 10.0): Unspecified vulnerability in Microsoft Internet Information Services (IIS) 5.1 through 6.0 allows remote attackers to…
CVE-2001-0500 — Critical (CVSS 10.0): Buffer overflow in ISAPI extension (idq.dll) in Index Server 2.0 and Indexing Service 2000 in IIS 6.0 beta and earlier…
CVE-1999-1011 — Critical (CVSS 10.0): The Remote Data Service (RDS) DataFactory component of Microsoft Data Access Components (MDAC) in IIS 3.x and 4.x…
CVE-1999-0874 — Critical (CVSS 10.0): Buffer overflow in IIS 4.0 allows remote attackers to cause a denial of service via a malformed request for files with…
CVE-1999-0407 — Critical (CVSS 10.0): By default, IIS 4.0 has a virtual directory /IISADMPWD which contains files that can be used as proxies for brute force…
CVE-1999-1376 — Critical (CVSS 10.0): Buffer overflow in fpcount.exe in IIS 4.0 with FrontPage Server Extensions allows remote attackers to execute arbitrary…

All CVEs affecting Microsoft Internet Information Server →