How severe is CVE-2001-0766?

CVE-2001-0766 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2001-0766 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-0766?

CVE-2001-0766 affects Apache Http Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2001-0766?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2001-0766 published?

CVE-2001-0766 was published on 2001-10-18 and last updated on 2026-06-16.

CVE-2001-0766

CVE-2001-0766 is a critical-severity vulnerability in Apache Http Server with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-178.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 9% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-178
Affected product: Apache Http Server
Published: 2001-10-18
Last modified: 2026-06-16

Description

Apache on MacOS X Client 10.0.3 with the HFS+ file system allows remote attackers to bypass access restrictions via a URL that contains some characters whose case is not matched by Apache's filters.

Frequently asked questions

What is CVE-2001-0766?: Apache on MacOS X Client 10.0.3 with the HFS+ file system allows remote attackers to bypass access restrictions via a URL that contains some characters whose case is not matched by Apache's filters.
How severe is CVE-2001-0766?: CVE-2001-0766 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2001-0766 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-0766?: CVE-2001-0766 affects Apache Http Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2001-0766?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2001-0766 published?: CVE-2001-0766 was published on 2001-10-18 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:apache:http_server:1.3.14:*:*:*:*:*:*:*

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