What’s Vulnerable › Vulnerabilities

CVE-2011-2005: Microsoft Ancillary Function Driver (afd.sys) Improper Input Validation Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2022-03-28
• EPSS: 31.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2011-10-12 · updated 2026-06-16

Description

afd.sys in the Ancillary Function Driver in Microsoft Windows XP SP2 and SP3 and Server 2003 SP2 does not properly validate user-mode input passed to kernel mode, which allows local users to gain privileges via a crafted application, aka "Ancillary Function Driver Elevation of Privilege Vulnerability."

Affected products

• Microsoft Windows Server 2003: all versions
• Microsoft Windows XP Service Pack 3: all versions

References

• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-080
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13114
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-080
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13114
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2011-2005

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