Is CVE-2009-1856 in the CISA KEV catalog?

No. CVE-2009-1856 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-1856?

CVE-2009-1856 has a CVSS v2 base score of 9.3 (HIGH).

What is the EPSS score for CVE-2009-1856?

CVE-2009-1856 has an EPSS score of 13.86% (96th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2009-1856

HIGHEPSS 96th pctl

9.3

CVSS v2

NVD

Description

Integer overflow in Adobe Reader 7 and Acrobat 7 before 7.1.3, Adobe Reader 8 and Acrobat 8 before 8.1.6, and Adobe Reader 9 and Acrobat 9 before 9.1.2 allows attackers to cause a denial of service or possibly execute arbitrary code via a PDF file containing unspecified parameters to the FlateDecode filter, which triggers a heap-based buffer overflow.

CWE-189

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

13.86%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.