How severe is CVE-2009-3135?

CVE-2009-3135 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2009-3135 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 36% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-3135?

CVE-2009-3135 primarily affects Microsoft Office. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-3135?

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-2009-3135 published?

CVE-2009-3135 was published on 2009-11-11 and last updated on 2026-06-16.

CVE-2009-3135

CVE-2009-3135 is a critical-severity vulnerability in Microsoft Office with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 36% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 36% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Microsoft Office
Published: 2009-11-11
Last modified: 2026-06-16

Description

Stack-based buffer overflow in Microsoft Office Word 2002 SP3 and 2003 SP3, Office 2004 and 2008 for Mac, Open XML File Format Converter for Mac, Office Word Viewer 2003 SP3, and Office Word Viewer allow remote attackers to execute arbitrary code via a Word document with a malformed File Information Block (FIB) structure, aka "Microsoft Office Word File Information Memory Corruption Vulnerability."

Frequently asked questions

What is CVE-2009-3135?: Stack-based buffer overflow in Microsoft Office Word 2002 SP3 and 2003 SP3, Office 2004 and 2008 for Mac, Open XML File Format Converter for Mac, Office Word Viewer 2003 SP3, and Office Word Viewer allow remote attackers to execute arbitrary code via a Word document with a malformed File Information Block (FIB) structure, aka "Microsoft Office Word File Information Memory Corruption Vulnerability."
How severe is CVE-2009-3135?: CVE-2009-3135 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2009-3135 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 36% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-3135?: CVE-2009-3135 primarily affects Microsoft Office. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-3135?: 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-2009-3135 published?: CVE-2009-3135 was published on 2009-11-11 and last updated on 2026-06-16.

References

Affected products (7)

cpe:2.3:a:microsoft:office:2004:*:mac:*:*:*:*:*
cpe:2.3:a:microsoft:office:2008:*:mac:*:*:*:*:*
cpe:2.3:a:microsoft:office_word:2002:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_word:2003:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_word_viewer:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_word_viewer:2003:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:open_xml_file_format_converter:*:*:mac:*:*:*:*:*

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