CVE-2009-0191

CVE-2009-0191 is a critical-severity vulnerability in Foxitsoftware Foxit Reader with a CVSS 2.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.

Key facts

• Severity: Critical (CVSS 2.0 base score 9.3)
• EPSS exploit prediction: 5% (92nd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-94
• Affected product: Foxitsoftware Foxit Reader
• Published: 2009-03-10
• Last modified: 2026-06-16

Description

Foxit Reader 2.3 before Build 3902 and 3.0 before Build 1506, including 3.0.2009.1301, does not properly handle a JBIG2 symbol dictionary segment with zero new symbols, which allows remote attackers to execute arbitrary code via a crafted PDF file that triggers a dereference of an uninitialized memory location.

Frequently asked questions

What is CVE-2009-0191?

Foxit Reader 2.3 before Build 3902 and 3.0 before Build 1506, including 3.0.2009.1301, does not properly handle a JBIG2 symbol dictionary segment with zero new symbols, which allows remote attackers to execute arbitrary code via a crafted PDF file that triggers a dereference of an uninitialized memory location.

How severe is CVE-2009-0191?

CVE-2009-0191 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2009-0191 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0191?

CVE-2009-0191 primarily affects Foxitsoftware Foxit Reader. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0191?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2009-0191 published?

CVE-2009-0191 was published on 2009-03-10 and last updated on 2026-06-16.

References

• http://secunia.com/advisories/34036
• http://secunia.com/secunia_research/2009-11/
• http://www.foxitsoftware.com/pdf/reader/security.htm#Processing
• http://www.securityfocus.com/archive/1/501590/100/0/threaded
• http://www.securityfocus.com/bid/34035
• http://www.securitytracker.com/id?1021822
• http://www.vupen.com/english/advisories/2009/0634
• https://exchange.xforce.ibmcloud.com/vulnerabilities/49135

Affected products (3)

• cpe:2.3:a:foxitsoftware:foxit_reader:2.3:*:*:*:*:*:*:*
• cpe:2.3:a:foxitsoftware:foxit_reader:3.0:*:*:*:*:*:*:*
• cpe:2.3:a:foxitsoftware:foxit_reader:3.0.2009.1301:*:*:*:*:*:*:*

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