How severe is CVE-2006-3864?

CVE-2006-3864 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2006-3864 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 34% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-3864?

CVE-2006-3864 primarily affects Microsoft Office. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-3864?

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-2006-3864 published?

CVE-2006-3864 was published on 2006-10-10 and last updated on 2026-06-16.

CVE-2006-3864

CVE-2006-3864 is a critical-severity vulnerability in Microsoft Office with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 34% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 34% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Microsoft Office
Published: 2006-10-10
Last modified: 2026-06-16

Description

Unspecified vulnerability in mso.dll in Microsoft Office 2000, XP, and 2003, and Microsoft PowerPoint 2000, XP, and 2003, allows remote user-assisted attackers to execute arbitrary code via a malformed record in a (1) .DOC, (2) .PPT, or (3) .XLS file that triggers memory corruption, related to an "array boundary condition" (possibly an array index overflow), a different vulnerability than CVE-2006-3434, CVE-2006-3650, and CVE-2006-3868.

Frequently asked questions

What is CVE-2006-3864?: Unspecified vulnerability in mso.dll in Microsoft Office 2000, XP, and 2003, and Microsoft PowerPoint 2000, XP, and 2003, allows remote user-assisted attackers to execute arbitrary code via a malformed record in a (1) .DOC, (2) .PPT, or (3) .XLS file that triggers memory corruption, related to an "array boundary condition" (possibly an array index overflow), a different vulnerability than CVE-2006-3434, CVE-2006-3650, and CVE-2006-3868.
How severe is CVE-2006-3864?: CVE-2006-3864 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2006-3864 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 34% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-3864?: CVE-2006-3864 primarily affects Microsoft Office. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-3864?: 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-2006-3864 published?: CVE-2006-3864 was published on 2006-10-10 and last updated on 2026-06-16.

References

Affected products (9)

cpe:2.3:a:microsoft:office:2000:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:office:2003:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:office:2003:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:office:2004:*:mac:*:*:*:*:*
cpe:2.3:a:microsoft:office:v.x:*:mac:*:*:*:*:*
cpe:2.3:a:microsoft:office:xp:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:project:2000:sr1:*:*:*:*:*:*
cpe:2.3:a:microsoft:project:2002:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:visio:2002:sp2:*:*:*:*:*:*

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