CVE-2002-0661

Status: ModifiedHigh (7.5)—💥 Exploit
Directory traversal vulnerability in Apache 2.0 through 2.0.39 on Windows, OS2, and Netware allows remote attackers to read arbitrary files and execute commands via .. (dot dot) sequences containing \ (backslash) characters.
CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Base score: 7.5
Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 70%
Percentile among all scored CVEs: 99
Score date: 10/7/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.
Published on Exploit-DB · Apache 2.0 - Encoded Backslash Directory Traversal (8/9/2002)
Affected technologies (1)

Apache — Http Server
CWEs

NVD-CWE-Other
References

Raw JSON (NVD)

Show
{
  "id": "CVE-2002-0661",
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
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        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
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  "published": "2002-08-12T04:00:00.000",
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      "value": "Directory traversal vulnerability in Apache 2.0 through 2.0.39 on Windows, OS2, and Netware allows remote attackers to read arbitrary files and execute commands via .. (dot dot) sequences containing \\ (backslash) characters."
    }
  ],
  "lastModified": "2026-06-16T21:57:53.483",
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  "vendorComments": [
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      "comment": "Fixed in Apache HTTP Server 2.0.40:\nhttp://httpd.apache.org/security/vulnerabilities_20.html",
      "lastModified": "2008-07-02T00:00:00",
      "organization": "Apache"
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}