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CVE-2001-0333· NVD / CVE Program· CNA mitre

Directory traversal vulnerability in IIS 5.0 and earlier allows remote attackers to execute arbitrary commands by encoding ..

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

HighCVSS 7.5 · v2.0—Weaponized No fix recorded
Published
Jun 27, 2001
Updated
Jun 16, 2026
EPSS
90.8% · 100th percentile
CWE
—
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Report tools

JSON

Action score

57

Plan

Add it to your regular patch cycle.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
27 / 30 · 90.8%

Affected systems

VendorProduct
microsoftinternet information server

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft internet information serverup to 5.0 inclusive
  • microsoft internet information server4.0

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2009-3023Buffer overflow in the FTP Service in Microsoft Internet Information Services (IIS) 5.0 through 6.0 allows remote authenticated users to exe
    63This week
  • CVE-1999-0874Buffer overflow in IIS 4.0 allows remote attackers to cause a denial of service via a malformed request for files with .HTR, .IDC, or .STM e
    62This week
  • CVE-2008-0075Unspecified vulnerability in Microsoft Internet Information Services (IIS) 5.1 through 6.0 allows remote attackers to execute arbitrary code
    57Plan
  • CVE-2006-0026Buffer overflow in Microsoft Internet Information Services (IIS) 5.0, 5.1, and 6.0 allows local and possibly remote attackers to execute arb
    53Plan
  • CVE-2002-0079Buffer overflow in the chunked encoding transfer mechanism in Internet Information Server (IIS) 4.0 and 5.0 Active Server Pages allows attac
    53Plan
  • CVE-2007-2897Microsoft Internet Information Services (IIS) 6.0 allows remote attackers to cause a denial of service (server instability or device hang),
    52Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1
  • Exploit-DB entry ×9

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entryremote2001-05-15
Exploit-DB entryremote2001-05-16
Exploit-DB entryremote2001-05-15
Exploit-DB entryremote2001-05-15
Exploit-DB entryremote2001-05-15
Exploit-DB entryremote2001-05-15
Exploit-DB entryremote2001-05-15
Exploit-DB entryremote2001-05-15
Exploit-DB entryremote2011-01-08
Metasploit moduleexploit/windows/iis/ms01_026_dbldecodeMS01-026 Microsoft IIS/PWS CGI Filename Double Decode Command Executionexploit2001-05-15

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. First PoC-43 d
  2. Metasploit-43 d
  3. Published
  4. TodaySep 30, 2026+9227 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
P · data can be read
Integrity
P · data or configuration can be modified
Availability
P · the service can be disrupted
Attack complexity
Low
Confidentiality impact
P
Integrity impact
P
Availability impact
P

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records