How severe is CVE-2010-0266?

CVE-2010-0266 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2010-0266 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 55% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-0266?

CVE-2010-0266 primarily affects Microsoft Outlook. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-0266?

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-2010-0266 published?

CVE-2010-0266 was published on 2010-07-15 and last updated on 2026-06-16.

CVE-2010-0266

CVE-2010-0266 is a critical-severity vulnerability in Microsoft Outlook with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 55% places it in the 99th 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: 55% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Microsoft Outlook
Published: 2010-07-15
Last modified: 2026-06-16

Description

Microsoft Office Outlook 2002 SP3, 2003 SP3, and 2007 SP1 and SP2 does not properly verify e-mail attachments with a PR_ATTACH_METHOD property value of ATTACH_BY_REFERENCE, which allows user-assisted remote attackers to execute arbitrary code via a crafted message, aka "Microsoft Outlook SMB Attachment Vulnerability."

Frequently asked questions

What is CVE-2010-0266?: Microsoft Office Outlook 2002 SP3, 2003 SP3, and 2007 SP1 and SP2 does not properly verify e-mail attachments with a PR_ATTACH_METHOD property value of ATTACH_BY_REFERENCE, which allows user-assisted remote attackers to execute arbitrary code via a crafted message, aka "Microsoft Outlook SMB Attachment Vulnerability."
How severe is CVE-2010-0266?: CVE-2010-0266 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2010-0266 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 55% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-0266?: CVE-2010-0266 primarily affects Microsoft Outlook. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-0266?: 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-2010-0266 published?: CVE-2010-0266 was published on 2010-07-15 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:a:microsoft:outlook:2002:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:outlook:2003:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:outlook:2007:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:outlook:2007:sp2:*:*:*:*:*:*

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