CVE-2009-1493

Status: ModifiedMedium (6.8)—Exploit

Severity6.8Medium · CVSS 2.0

Exploitation probability22 %higher than 98% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitAvailablePublished on Exploit-DB

The customDictionaryOpen spell method in the JavaScript API in Adobe Reader 9.1, 8.1.4, 7.1.1, and earlier on Linux and UNIX allows remote attackers to cause a denial of service (memory corruption) or execute arbitrary code via a PDF file that triggers a call to this method with a long string in the second argument.

CVSS

Base score: 6.8
Version: 2.0
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 22 %
Percentile among all scored CVEs: 98
Score date: 10/20/2026

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 · Adobe 8.1.4/9.1 - 'customDictionaryOpen()' Code Execution (4/29/2009)

Affected technologies (1)

Adobe — Reader

CWEs

CWE-399

References

Show 52 references

Raw JSON (NVD)

Show

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    {
      "lang": "en",
      "value": "The customDictionaryOpen spell method in the JavaScript API in Adobe Reader 9.1, 8.1.4, 7.1.1, and earlier on Linux and UNIX allows remote attackers to cause a denial of service (memory corruption) or execute arbitrary code via a PDF file that triggers a call to this method with a long string in the second argument."
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  "lastModified": "2026-06-16T23:07:23.167",
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      "nodes": [
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