How severe is CVE-2009-3431?

CVE-2009-3431 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2009-3431 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-3431?

CVE-2009-3431 primarily affects Adobe Acrobat. In total, 85 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-3431?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-3431 published?

CVE-2009-3431 was published on 2009-09-25 and last updated on 2026-06-16.

CVE-2009-3431

CVE-2009-3431 is a medium-severity vulnerability in Adobe Acrobat with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 21% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 21% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Adobe Acrobat
Published: 2009-09-25
Last modified: 2026-06-16

Description

Stack consumption vulnerability in Adobe Reader and Acrobat 9.1.3, 9.1.2, 9.1.1, and earlier 9.x versions; 8.1.6 and earlier 8.x versions; and possibly 7.1.4 and earlier 7.x versions allows remote attackers to cause a denial of service (application crash) via a PDF file with a large number of [ (open square bracket) characters in the argument to the alert method. NOTE: some of these details are obtained from third party information.

Frequently asked questions

What is CVE-2009-3431?: Stack consumption vulnerability in Adobe Reader and Acrobat 9.1.3, 9.1.2, 9.1.1, and earlier 9.x versions; 8.1.6 and earlier 8.x versions; and possibly 7.1.4 and earlier 7.x versions allows remote attackers to cause a denial of service (application crash) via a PDF file with a large number of [ (open square bracket) characters in the argument to the alert method. NOTE: some of these details are obtained from third party information.
How severe is CVE-2009-3431?: CVE-2009-3431 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2009-3431 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-3431?: CVE-2009-3431 primarily affects Adobe Acrobat. In total, 85 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-3431?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-3431 published?: CVE-2009-3431 was published on 2009-09-25 and last updated on 2026-06-16.

References

Affected products (85)

cpe:2.3:a:adobe:acrobat:7.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0:*:professional:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0:*:standard:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.1:*:*:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.1:*:professional:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.1:*:standard:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.2:*:*:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.2:*:professional:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.2:*:standard:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.3:*:*:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.3:*:professional:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.3:*:standard:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.4:*:*:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.4:*:professional:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.4:*:standard:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.5:*:*:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.5:*:professional:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.5:*:standard:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.6:*:*:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.6:*:professional:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.6:*:standard:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.7:*:*:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.7:*:professional:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.7:*:standard:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.8:*:*:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.8:*:elements:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.8:*:professional:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.8:*:standard:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.9:*:*:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.0.9:*:professional:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.1:*:*:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.1:*:professional:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.1:*:standard:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.1.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.1.1:*:*:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:7.1.1:*:standard:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:8.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:8.0:*:professional:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:8.0:*:standard:*:*:*:*:*
cpe:2.3:a:adobe:acrobat:8.1:*:*:*:*:*:*:*

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