What’s Vulnerable › Vulnerabilities

CVE-2011-2013

• Severity: critical (CVSS 10.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 32.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2011-11-08 · updated 2026-06-16
• Weakness: CWE-189

Description

Integer overflow in the TCP/IP implementation in Microsoft Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote attackers to execute arbitrary code by sending a sequence of crafted UDP packets to a closed port, aka "Reference Counter Overflow Vulnerability."

Affected products

• Microsoft Windows 7: all versions
• Microsoft Windows Server 2008: r2
• Microsoft Windows Vista: all versions

References

• http://www.securitytracker.com/id?1026290
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-083
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13877
• http://www.securitytracker.com/id?1026290
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-083
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13877

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