How severe is CVE-2008-4026?

CVE-2008-4026 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2008-4026 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 23% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-4026?

CVE-2008-4026 primarily affects Microsoft Office. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-4026?

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-2008-4026 published?

CVE-2008-4026 was published on 2008-12-10 and last updated on 2026-06-16.

CVE-2008-4026

CVE-2008-4026 is a critical-severity vulnerability in Microsoft Office with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 23% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-399.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 23% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Microsoft Office
Published: 2008-12-10
Last modified: 2026-06-16

Description

Microsoft Office Word 2000 SP3, 2002 SP3, 2003 SP3, and 2007 Gold and SP1; Word Viewer 2003 Gold and SP3; Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats Gold and SP1; Office 2004 and 2008 for Mac; and Open XML File Format Converter for Mac allow remote attackers to execute arbitrary code via a crafted Word document that contains a malformed value, which triggers memory corruption, aka "Word Memory Corruption Vulnerability."

Frequently asked questions

What is CVE-2008-4026?: Microsoft Office Word 2000 SP3, 2002 SP3, 2003 SP3, and 2007 Gold and SP1; Word Viewer 2003 Gold and SP3; Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats Gold and SP1; Office 2004 and 2008 for Mac; and Open XML File Format Converter for Mac allow remote attackers to execute arbitrary code via a crafted Word document that contains a malformed value, which triggers memory corruption, aka "Word Memory Corruption Vulnerability."
How severe is CVE-2008-4026?: CVE-2008-4026 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2008-4026 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 23% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-4026?: CVE-2008-4026 primarily affects Microsoft Office. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-4026?: 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-2008-4026 published?: CVE-2008-4026 was published on 2008-12-10 and last updated on 2026-06-16.

References

Affected products (14)

cpe:2.3:a:microsoft:office:2004:*:mac:*:*:*:*:*
cpe:2.3:a:microsoft:office:2008:*:mac:*:*:*:*:*
cpe:2.3:a:microsoft:office_compatibility_pack_for_word_excel_ppt_2007:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_compatibility_pack_for_word_excel_ppt_2007:*:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_word_viewer:2003:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_word_viewer:2003:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:open_xml_file_format_converter:*:*:mac:*:*:*:*:*
cpe:2.3:a:microsoft:works:8.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_outlook:2007:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_outlook:2007:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_word:2000:sp3:*:*:*:*:*:*
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:2007:*:*:*:*:*:*:*

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Other CWE-399 (Resource Management Errors) vulnerabilities

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CVE-2015-0339 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
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