What’s Vulnerable › Vulnerabilities

CVE-2009-2526

• Severity: high (CVSS 7.8 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 81.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2009-10-14 · updated 2026-06-16
• Weakness: CWE-399

Description

Microsoft Windows Vista Gold, SP1, and SP2 and Server 2008 Gold and SP2 do not properly validate fields in SMBv2 packets, which allows remote attackers to cause a denial of service (infinite loop and system hang) via a crafted packet to the Server service, aka "SMBv2 Infinite Loop Vulnerability."

Affected products

• Microsoft Windows Server 2008: all versions
• Microsoft Windows Vista: all versions

References

• http://www.us-cert.gov/cas/techalerts/TA09-286A.html
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-050
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5595
• http://www.us-cert.gov/cas/techalerts/TA09-286A.html
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-050
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5595

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