CVE-2014-1520

Status: ModifiedMedium (6.9)—
maintenservice_installer.exe in the Maintenance Service Installer in Mozilla Firefox before 29.0 and Firefox ESR 24.x before 24.5 on Windows allows local users to gain privileges by placing a Trojan horse DLL file into a temporary directory at an unspecified point in the update process.
CVSS

Version: 2.0
Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C
Base score: 6.9
Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.41%
Percentile among all scored CVEs: 33
Score date: 10/12/2026
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)

Fedoraproject — Fedora Mozilla — Firefox
CWEs

CWE-269
References

Raw JSON (NVD)

Show
{
  "id": "CVE-2014-1520",
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          "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
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        "acInsufInfo": false,
        "impactScore": 10,
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  "published": "2014-04-30T10:49:04.753",
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      "lang": "en",
      "value": "maintenservice_installer.exe in the Maintenance Service Installer in Mozilla Firefox before 29.0 and Firefox ESR 24.x before 24.5 on Windows allows local users to gain privileges by placing a Trojan horse DLL file into a temporary directory at an unspecified point in the update process."
    },
    {
      "lang": "es",
      "value": "maintenservice_installer.exe en Maintenance Service Installer en Mozilla Firefox anterior a 29.0 y Firefox ESR 24.x anterior a 24.5 en Windows permite a usuarios locales ganar privilegios mediante la colocación de un archivo DLL de caballo de troya dentro de un directorio temporal en un momento no especificado en el proceso de actualización."
    }
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  "lastModified": "2026-06-17T00:05:03.633",
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