Overview
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.
https://nvd.nist.gov/vuln/detail/CVE-2011-2005
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2011-2005 |
| Vendor / Product | Microsoft — Ancillary Function Driver (afd.sys) |
| NVD Published | 2011-10-12 |
| NVD Last Modified | 2025-10-22 |
| CVSS 3.1 Score | 7.8 |
| CVSS 3.1 Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| Severity | HIGH |
| CISA KEV Added | 2022-03-28 |
| CISA KEV Deadline | 2022-04-18 |
| Known Ransomware Use | No |
CVSS 3.1 Breakdown
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Required Action
CISA BOD 22-01 Deadline: 2022-04-18.
Apply updates per vendor instructions.
Timeline
| Date | Event |
|---|---|
| 2022-03-28 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2022-04-18 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2011-2005 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |