March 28, 2022 · Applied Cybernetics Group
CVE-2011-2005 — Microsoft Ancillary Function Driver (afd.sys)
Microsoft Ancillary Function Driver (afd.sys) Improper Input Validation Vulnerability
- Added to KEV
2022-03-28- Federal due date
2022-04-18- Vendor
- Microsoft
- Product
- Ancillary Function Driver (afd.sys)
- EPSS
- 98.6th percentile (score 0.671, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2011-2005
CISA short 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.
Required action
Apply updates per vendor instructions.