CVE-2011-2005

Status: AnalyzedHigh (7.8)⚠ Active exploitation

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

Version: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base score: 7.8

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 32%
Percentile among all scored CVEs: 98
Score date: 10/3/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

CISA KEV — actively exploited

Added to catalog: 3/28/2022
Remediation due date: 4/18/2022
Known ransomware use: Unknown

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1203 Exploitation for Client Executionexecution95 %
Secondary impactT1548 Abuse Elevation Control Mechanismprivilege escalation90 %

Explotación corregida por reglas (vector CVSS): era T1068

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Update Software User Account Management Restrict File and Directory Permissions Privileged Account Management Operating System Configuration Execution Prevention

Affected technologies (2)

Microsoft — Windows Server 2003 Microsoft — Windows XP

CWEs

NVD-CWE-noinfo

References

Raw JSON (NVD)

Show

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    }
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  "lastModified": "2026-06-16T23:30:35.373",
  "cisaActionDue": "2022-04-18",
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}