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CVE-2011-3640

Status: ModifiedHigh (7.1)—
Severity7.1High · CVSS 2.0
Exploitation probability1.40 %higher than 72% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

Untrusted search path vulnerability in Mozilla Network Security Services (NSS), as used in Google Chrome before 17 on Windows and Mac OS X, might allow local users to gain privileges via a Trojan horse pkcs11.txt file in a top-level directory. NOTE: the vendor's response was "Strange behavior, but we're not treating this as a security bug."

CVSS

Base score
7.1
Version
2.0
Vector
AV:N/AC:H/Au:S/C:C/I:C/A:C

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
1.40 %
Percentile among all scored CVEs
72
Score date
10/22/2026

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 (1)

Google — Chrome

CWEs

References

Show 14 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2011-3640",
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        "cvssData": {
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:H/Au:S/C:C/I:C/A:C",
          "authentication": "SINGLE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "HIGH",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
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        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
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  },
  "affected": [
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      "affectedData": [
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          "product": "n/a",
          "versions": [
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  ],
  "published": "2011-10-28T02:49:53.130",
  "references": [
    {
      "url": "http://blog.acrossecurity.com/2011/10/google-chrome-pkcs11txt-file-planting.html",
      "tags": [
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      "source": "secalert@redhat.com"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-426"
        }
      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Untrusted search path vulnerability in Mozilla Network Security Services (NSS), as used in Google Chrome before 17 on Windows and Mac OS X, might allow local users to gain privileges via a Trojan horse pkcs11.txt file in a top-level directory. NOTE: the vendor's response was \"Strange behavior, but we're not treating this as a security bug.\""
    },
    {
      "lang": "es",
      "value": "** CONTROVERTIDO ** Vulnerabilidad de ruta de búsqueda no confiable de Mozilla Network Security Services (NSS), que se utiliza en Google Chrome anterior a v17 en Windows y Mac OS X, puede permitir a usuarios locales conseguir privilegios a través de un archivo troyano pkcs11.txt en un directorio de alto nivel. NOTA: La respuesta del vendedor fue \" comportamiento extraño, pero no estamos tratando esto como un fallo de seguridad\""
    }
  ],
  "lastModified": "2026-06-16T23:33:40.473",
  "configurations": [
    {
      "nodes": [
        {
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              "vulnerable": true,
              "matchCriteriaId": "811305D7-7A0E-4F2D-A578-B9D415002329",
              "versionEndExcluding": "17.0"
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  "sourceIdentifier": "secalert@redhat.com"
}