CVE-2003-0907

Status: ModifiedMedium (5.1)—

Help and Support Center in Microsoft Windows XP SP1 does not properly validate HCP URLs, which allows remote attackers to execute arbitrary code via quotation marks in an hcp:// URL, which are not quoted when constructing the argument list to HelpCtr.exe.

CVSS

Version: 2.0
Vector: AV:N/AC:H/Au:N/C:P/I:P/A:P
Base score: 5.1

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 22%
Percentile among all scored CVEs: 98
Score date: 10/8/2026

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).

Affected technologies (2)

Microsoft — Windows Server 2003 Microsoft — Windows XP

CWEs

CWE-88

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2003-0907",
  "cveTags": [],
  "metrics": {
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        "source": "nvd@nist.gov",
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          "baseScore": 5.1,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:H/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "HIGH",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 4.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": true,
        "userInteractionRequired": true
      }
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  "affected": [
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      "affectedData": [
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          "vendor": "n/a",
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          "versions": [
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              "version": "n/a"
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  "published": "2004-06-01T04:00:00.000",
  "references": [
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      "url": "http://lists.grok.org.uk/pipermail/full-disclosure/2004-April/020065.html",
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-88"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Help and Support Center in Microsoft Windows XP SP1 does not properly validate HCP URLs, which allows remote attackers to execute arbitrary code via quotation marks in an hcp:// URL, which are not quoted when constructing the argument list to HelpCtr.exe."
    },
    {
      "lang": "es",
      "value": "El Centro de Ayuda y Soporte en Microsoft Windows XP SP1 no valida adecuadamente URLs HCP, lo que permite a atacantes remotos ejecutar código arbitrario mediante insertando comillas en una URL hcp://, las cuales no son entrecomilladas cuando se construye la lista de argumentos a HelpCtr.exe."
    }
  ],
  "lastModified": "2026-06-16T22:03:10.040",
  "configurations": [
    {
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        {
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}