CVE-2011-2005 | BDVDB-2026-47754 Detail

MicrosoftAncillary Function Driver (afd.sys)

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."

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: local.

Weaknesses#

No weakness recorded in the source data.

References#

Exploit#

No public exploit known

History#

Version 12011-10-12Record published in the CVE List.
Version 22025-10-22Most recent update recorded in the CVE List.

Published

Published: 2011-10-12
Last modified: 2025-10-22

Vendor information

Vendor: Microsoft
Product: Ancillary Function Driver (afd.sys)

All Microsoft vulnerabilities

Score

7.8 High

EPSS

31.7%, Moderate

Estimated chance of exploitation in the next 30 days. EPSS percentile: 98.3.

KEV

Yes

Listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

Apply updates per vendor instructions.

Affected Systems

No version data in the source record.

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.8 High

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

Metric breakdown
Attack Vector	Local
Attack Complexity	Low
Privileges Required	None
User Interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).