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CVE-2011-2005

7.8
HIGHCVSS v3.1 Base Score
67.09%
MEDIUM RiskEPSS (99th percentile)
KEV
NVD-CWE-noinfo

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."

Published: 10/12/2011
Modified: 4/22/2026
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ACTIVELY EXPLOITED IN THE WILD

This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Vulnerability Name:

Microsoft Ancillary Function Driver (afd.sys) Improper Input Validation Vulnerability

Vendor / Product:

Microsoft Ancillary Function Driver (afd.sys)

Required Action:

Apply updates per vendor instructions.

Due Date: 4/18/2022(OVERDUE)
Added to KEV:

3/28/2022

Notes:

https://nvd.nist.gov/vuln/detail/CVE-2011-2005

Vulnerability Summary

CVSS v3 Score

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2 Score

7.2

AV:L/AC:L/Au:N/C:C/I:C/A:C

EPSS Score (Exploitation Probability)

67.09%MEDIUM Exploitation Risk
99th percentile

This vulnerability has a 67.09% probability of being exploited in the next 30 days, ranking higher than 99% of all scored CVEs.

CWE Classification

NVD-CWE-noinfo

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