CVE-2011-0660

CVE-2011-0660 is a critical-severity vulnerability in Microsoft Windows 7 with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 17% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

• Severity: Critical (CVSS 2.0 base score 9.3)
• EPSS exploit prediction: 17% (97th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-20
• Affected product: Microsoft Windows 7
• Published: 2011-04-13
• Last modified: 2026-06-16

Description

The SMB client in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote SMB servers to execute arbitrary code via a crafted (1) SMBv1 or (2) SMBv2 response, aka "SMB Client Response Parsing Vulnerability."

Frequently asked questions

What is CVE-2011-0660?

The SMB client in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote SMB servers to execute arbitrary code via a crafted (1) SMBv1 or (2) SMBv2 response, aka "SMB Client Response Parsing Vulnerability."

How severe is CVE-2011-0660?

CVE-2011-0660 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2011-0660 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-0660?

CVE-2011-0660 primarily affects Microsoft Windows 7. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-0660?

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-2011-0660 published?

CVE-2011-0660 was published on 2011-04-13 and last updated on 2026-06-16.

References

• http://osvdb.org/71772
• http://www.securityfocus.com/bid/47239
• http://www.securitytracker.com/id?1025328
• http://www.us-cert.gov/cas/techalerts/TA11-102A.html
• http://www.vupen.com/english/advisories/2011/0938
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-019
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11995

Affected products (23)

• cpe:2.3:o:microsoft:windows_7:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_7:-:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_7:-:sp1:x64:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_7:-:sp1:x86:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_xp:*:sp3:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_xp:-:sp2:x64:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_2003_server:*:sp2:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_2003_server:*:sp2:itanium:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2003:*:sp2:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2008:*:*:itanium:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2008:*:*:x64:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2008:-:sp2:itanium:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2008:-:sp2:x64:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2008:-:sp2:x86:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_vista:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_vista:*:*:x64:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_vista:*:sp1:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_vista:*:sp2:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_vista:-:sp1:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_vista:-:sp2:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2008:*:r2:itanium:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2008:*:r2:x64:*:*:*:*:*

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