CVE-2012-3450

Status: ModifiedLow (2.6)—Exploit

Severity2.6Low · CVSS 2.0

Exploitation probability11 %higher than 96% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitAvailablePublished on Exploit-DB

pdo_sql_parser.re in the PDO extension in PHP before 5.3.14 and 5.4.x before 5.4.4 does not properly determine the end of the query string during parsing of prepared statements, which allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted parameter value.

CVSS

Base score: 2.6
Version: 2.0
Vector: AV:N/AC:H/Au:N/C:N/I:N/A:P

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 11 %
Percentile among all scored CVEs: 96
Score date: 10/21/2026

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 · PHP 5.4.3 - PDO Memory Access Violation Denial of Service (8/2/2012)

Affected technologies (1)

PHP — PHP

CWEs

NVD-CWE-Other

References

Show 20 references

Raw JSON (NVD)

Show

{
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          "vectorString": "AV:N/AC:H/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "HIGH",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
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        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 4.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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      "affectedData": [
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          "versions": [
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              "version": "n/a"
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  "published": "2012-08-06T16:55:05.963",
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    },
    {
      "lang": "es",
      "value": "pdo_sql_parser.re en la extensión PDO en PHP anteriores a v5.3.14 y v5.4.x anterior a v5.4.4 no determina de forma adecuada el final de la cadena en la petición durante un análisis sintáctico de estructuras preparadas, lo que permite a atacantes remotos a provocar una denegación de servicio (lectura fuera de los límites y caída de la aplicación)a través de un valor en el parámetro manipulado."
    }
  ],
  "lastModified": "2026-06-16T23:43:14.763",
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}