CVE-2010-0477

Severity: critical (CVSS 10.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 50.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2010-04-14 · updated 2026-06-16
Weakness: CWE-399

Description

The SMB client in Microsoft Windows Server 2008 R2 and Windows 7 does not properly handle (1) SMBv1 and (2) SMBv2 response packets, which allows remote SMB servers and man-in-the-middle attackers to execute arbitrary code via a crafted packet that causes the client to read the entirety of the response, and then improperly interact with the Winsock Kernel (WSK), aka "SMB Client Message Size Vulnerability."

Affected products

Microsoft Windows 7: all versions
Microsoft Windows Server 2008: all versions

References

http://secunia.com/advisories/39372
http://www.us-cert.gov/cas/techalerts/TA10-103A.html
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-020
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6859
http://secunia.com/advisories/39372
http://www.us-cert.gov/cas/techalerts/TA10-103A.html
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-020
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6859

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