How severe is CVE-2010-1263?

CVE-2010-1263 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2010-1263 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 29% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-1263?

CVE-2010-1263 primarily affects Microsoft Office. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-1263?

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-2010-1263 published?

CVE-2010-1263 was published on 2010-06-08 and last updated on 2026-06-16.

CVE-2010-1263

CVE-2010-1263 is a critical-severity vulnerability in Microsoft Office with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 29% 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: 29% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Microsoft Office
Published: 2010-06-08
Last modified: 2026-06-16

Description

Windows Shell and WordPad in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7; Microsoft Office XP SP3; Office 2003 SP3; and Office System 2007 SP1 and SP2 do not properly validate COM objects during instantiation, which allows remote attackers to execute arbitrary code via a crafted file, aka "COM Validation Vulnerability."

Frequently asked questions

What is CVE-2010-1263?: Windows Shell and WordPad in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7; Microsoft Office XP SP3; Office 2003 SP3; and Office System 2007 SP1 and SP2 do not properly validate COM objects during instantiation, which allows remote attackers to execute arbitrary code via a crafted file, aka "COM Validation Vulnerability."
How severe is CVE-2010-1263?: CVE-2010-1263 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2010-1263 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 29% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-1263?: CVE-2010-1263 primarily affects Microsoft Office. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-1263?: 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-2010-1263 published?: CVE-2010-1263 was published on 2010-06-08 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:a:microsoft:office:2003:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:office:2007:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:office:2007:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:office:xp:sp3:*:*:*:*:*:*

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