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Vulnerabilities

Vulnerability · CVE-2001-0333

Microsoft Internet Information Services (IIS) Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Published Mar 18, 2001 · catalog updated Mar 18, 2001 · Microsoft Internet Information Services (IIS)

Patch now

CVE-2001-0333 is in the CISA known-exploited catalog. Confirm Microsoft Internet Information Services (IIS) against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
90.77%
Remediation
Remediation guidance
Affected products
stated Internet Information Services (IIS) · vendor Microsoft Internet Information Services (IIS)

Directory traversal vulnerability in IIS 5.0 and earlier allows remote attackers to execute arbitrary commands by encoding .. (dot dot) and "\" characters twice.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated Internet Information Services (IIS)<= 5.0
  • vendor Microsoft Internet Information Services (IIS)version unspecified

How to fix CVE-2001-0333

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2001-0333 is in the CISA known-exploited catalog. Confirm Microsoft Internet Information Services (IIS) against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with Internet Information Services (IIS) <= 5.0. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 90.77%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 18, 2001 · VulnCheck KEV

    Detected

    Directory traversal vulnerability in IIS 5.0 and earlier allows remote attackers to execute arbitrary commands by encoding .. (dot dot) and "\" characters twice.

  2. Mar 18, 2001 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2001-0333

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2001-0333

    30-day exploitation probability 90.8%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2001-0333

    Directory traversal vulnerability in IIS 5.0 and earlier allows remote attackers to execute arbitrary commands by encoding .. (dot dot) and "\" characters twice.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.