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CVE-2011-2005

CISA KEV

Published March 28, 2022 · Updated April 3, 2026

high
Official Description+

afd.sys in the Ancillary Function Driver in Microsoft Windows does not properly validate user-mode input passed to kernel mode, which allows local users to gain privileges via a crafted application.

Affected Products

VendorProduct
MicrosoftAncillary Function Driver (afd.sys)

Patch Status

Patch by 2022-04-18

Recommended Actions

  1. Check if your systems use any of the affected products listed above.
  2. Apply vendor patches immediately if available.
  3. This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
  4. Monitor vendor advisories for updates and additional mitigations.
  5. Review logs for indicators of compromise related to CVE-2011-2005.