CVE-2007-2903

Status: ModifiedMedium (5)—💥 Exploit

Buffer overflow in the HelpPopup method in the Microsoft Office 2000 Controllo UA di Microsoft Office ActiveX control (OUACTRL.OCX) 1.0.1.9 allows remote attackers to cause a denial of service (probably winhlp32.exe crash) via a long first argument. NOTE: it is not clear whether this issue crosses privilege boundaries.

CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Base score: 5

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 29%
Percentile among all scored CVEs: 98
Score date: 10/11/2026

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 · Microsoft Office 2000 (OUACTRL.OCX 1.0.1.9) - Remote Denial of Service (5/23/2007)

Affected technologies (1)

Microsoft — Office

CWEs

NVD-CWE-Other

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2007-2903",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2007-05-30T10:30:00.000",
  "references": [
    {
      "url": "http://moaxb.blogspot.com/2007/05/moaxb-23-microsoft-office-2000.html",
      "tags": [
        "Exploit"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://osvdb.org/36034",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://shinnai.altervista.org/viewtopic.php?id=42&t_id=26",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/24118",
      "source": "cve@mitre.org"
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      "url": "http://www.securitytracker.com/id?1018107",
      "source": "cve@mitre.org"
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      "tags": [
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      "source": "cve@mitre.org"
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "url": "http://www.shinnai.altervista.org/moaxb/20070523/ouactrltxt.html",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/34473",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Buffer overflow in the HelpPopup method in the Microsoft Office 2000 Controllo UA di Microsoft Office ActiveX control (OUACTRL.OCX) 1.0.1.9 allows remote attackers to cause a denial of service (probably winhlp32.exe crash) via a long first argument.  NOTE: it is not clear whether this issue crosses privilege boundaries."
    },
    {
      "lang": "es",
      "value": "Desbordamiento de búfer en el método HelpPopup en el control ActiveX Microsoft Office 2000 Controllo UA di Microsoft (OUACTRL.OCX) 1.0.1.9, permite a atacantes remotos provocar una denegación de servicio (probablemente caída de winhlp32.exe) mediante un primer argumento largo.\r\nNOTA: No está claro si esta vulnerabilidad cruza límites de privilegios."
    }
  ],
  "lastModified": "2026-06-16T22:40:40.403",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:microsoft:office:2000:*:*:*:*:*:*:*",
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              "matchCriteriaId": "A9A82D13-513C-46FA-AF51-0582233E230A"
            }
          ],
          "operator": "OR"
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  ],
  "sourceIdentifier": "cve@mitre.org"
}