High 7.8Known exploited (CISA KEV)Published Oct 12, 2011

CVE-2011-2005afd.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 pri…

Updated under an hour ago (2026-10-19 05:50 UTC)

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It affects microsoft windows_server_2003 and 1 other product. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Mar 28, 2022; federal agencies had to remediate by Apr 18, 2022. Treat that date as your deadline.

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Every CVE for microsoft windows_server_2003

Exploited in the last 30 days

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."

CVSS: 7.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Added to CISA KEV Mar 28, 2022; federal remediation due Apr 18, 2022Apply updates per vendor instructions.
EPSS (exploitation in the next 30 days): 31.76% (percentile 98)
Assigned by: microsoft
NVD analysis: Analyzed
Record last updated: Oct 22, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

microsoft windows_server_2003 microsoft:windows_server_2003	all versions	NVD
microsoft windows_xp microsoft:windows_xp	all versions; all versions	NVD

References

https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13114vdb-entry, signature, x-refsource-oval, broken-link
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-080vendor-advisory, x-refsource-ms, patch
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2011-2005us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.