How severe is CVE-2001-0337?

CVE-2001-0337 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2001-0337 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-0337?

CVE-2001-0337 affects Microsoft Internet Information Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2001-0337?

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

When was CVE-2001-0337 published?

CVE-2001-0337 was published on 2001-06-27 and last updated on 2026-06-16.

CVE-2001-0337

CVE-2001-0337 is a medium-severity vulnerability in Microsoft Internet Information Server with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Internet Information Server
Published: 2001-06-27
Last modified: 2026-06-16

Description

The Microsoft MS01-014 and MS01-016 patches for IIS 5.0 and earlier introduce a memory leak which allows attackers to cause a denial of service via a series of requests.

Frequently asked questions

What is CVE-2001-0337?: The Microsoft MS01-014 and MS01-016 patches for IIS 5.0 and earlier introduce a memory leak which allows attackers to cause a denial of service via a series of requests.
How severe is CVE-2001-0337?: CVE-2001-0337 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2001-0337 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-0337?: CVE-2001-0337 affects Microsoft Internet Information Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2001-0337?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2001-0337 published?: CVE-2001-0337 was published on 2001-06-27 and last updated on 2026-06-16.

References

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-026

Affected products (1)

cpe:2.3:a:microsoft:internet_information_server:*:*:*:*:*:*:*:*

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