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:*:*:*:*:*:*

More vulnerabilities in Microsoft Outlook

CVE-2001-0538 — Critical (CVSS 10.0): Microsoft Outlook View ActiveX Control in Microsoft Outlook 2002 and earlier allows remote attackers to execute…
CVE-2023-23397 — Critical (CVSS 9.8): Microsoft Outlook Elevation of Privilege Vulnerability
CVE-2013-3870 — Critical (CVSS 9.3): Double free vulnerability in Microsoft Outlook 2007 SP3 and 2010 SP1 and SP2 allows remote attackers to execute…
CVE-2010-2728 — Critical (CVSS 9.3): Heap-based buffer overflow in Microsoft Outlook 2002 SP3, 2003 SP3, and 2007 SP2, when Online Mode for an Exchange…
CVE-2007-0033 — Critical (CVSS 9.3): Microsoft Outlook 2002 and 2003 allows user-assisted remote attackers to execute arbitrary code via a malformed VEVENT…
CVE-2007-0034 — Critical (CVSS 9.3): Buffer overflow in the Advanced Search (Finder.exe) feature of Microsoft Outlook 2000, 2002, and 2003 allows…

All CVEs affecting Microsoft Outlook →

Other CWE-94 (Code Injection) vulnerabilities

CVE-2026-57624 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Blocksy Companion Pro <= 2.1.46 versions.
CVE-2026-10134 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 allows an attacker to read every secret available to the Langflow process, read…
CVE-2026-53576 — Critical (CVSS 10.0): Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the authentication filter…
CVE-2026-10561 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined…
CVE-2026-25470 — Critical (CVSS 10.0): Improper Control of Generation of Code ('Code Injection') vulnerability in ACPT ACPT (Pro) - Custom Post Types Plugin…
CVE-2026-48836 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Easy Invoice <= 2.1.19 versions.

Browse all CWE-94 (Code Injection) vulnerabilities →