CVE-2011-2005

Name: CVE-2011-2005
Creator: NVD / NIST
Published: 2011-10-12T02:52:43.91+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10Actively ExploitedEPSS 31.76%

Last modified Jun 16, 2026

CVE-2011-2005 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.". CISA has confirmed active exploitation in the wild. EPSS estimates a 31.76% chance of exploitation in the next 30 days.

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."

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

31.76%

98.1th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Apr 18, 2022.

Affected Software

Vendor	Product	Versions	Update
Microsoft	Windows Server 2003	All versions	Sp2
Microsoft	Windows Xp	All versions	Sp2

References

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-080Patch, Vendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13114Broken Link
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-080Patch, Vendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13114Broken Link
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2011-2005US Government Resource

Timeline

Published: Oct 12, 2011
Last Modified: Jun 16, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2011-2005?

How severe is CVE-2011-2005?

CVE-2011-2005 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 31.76% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2011-2005?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-2005?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST