How severe is CVE-2008-1434?

CVE-2008-1434 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2008-1434 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 31% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-1434?

CVE-2008-1434 primarily affects Microsoft Office. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-1434?

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-2008-1434 published?

CVE-2008-1434 was published on 2008-05-13 and last updated on 2026-06-16.

CVE-2008-1434

CVE-2008-1434 is a critical-severity vulnerability in Microsoft Office with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 31% 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: 31% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Microsoft Office
Published: 2008-05-13
Last modified: 2026-06-16

Description

Use-after-free vulnerability in Microsoft Word in Office 2000 and XP SP3, 2003 SP2 and SP3, and 2007 Office System SP1 and earlier allows remote attackers to execute arbitrary code via an HTML document with a large number of Cascading Style Sheets (CSS) selectors, related to a "memory handling error" that triggers memory corruption.

Frequently asked questions

What is CVE-2008-1434?: Use-after-free vulnerability in Microsoft Word in Office 2000 and XP SP3, 2003 SP2 and SP3, and 2007 Office System SP1 and earlier allows remote attackers to execute arbitrary code via an HTML document with a large number of Cascading Style Sheets (CSS) selectors, related to a "memory handling error" that triggers memory corruption.
How severe is CVE-2008-1434?: CVE-2008-1434 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2008-1434 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 31% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-1434?: CVE-2008-1434 primarily affects Microsoft Office. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-1434?: 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-2008-1434 published?: CVE-2008-1434 was published on 2008-05-13 and last updated on 2026-06-16.

References

Affected products (12)

cpe:2.3:a:microsoft:office:2000:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:office:2003:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:office:2003:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:office:2004:*:mac:*:*:*:*:*
cpe:2.3:a:microsoft:office:2007:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office:2007_sp1:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office:2008:*:mac:*:*:*:*:*
cpe:2.3:a:microsoft:office:xp:sp3:*:*:*:*:*:*
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:word_viewer:2003:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:word_viewer:2003:*:sp3:*:*:*:*:*

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Other CWE-399 (Resource Management Errors) vulnerabilities

CVE-2015-8104 — Critical (CVSS 10.0): The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a…
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…
CVE-2014-0560 — Critical (CVSS 10.0): Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.12 and 11.x before 11.0.09 on Windows and OS…

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