Which products and versions are affected by CVE-2011-2005?

Affected: Windows Server 2003 (Microsoft); Windows Xp (Microsoft). The full list is in the CVE brief.

Is CVE-2011-2005 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 1, 2016.

Is CVE-2011-2005 in the CISA KEV catalog?

Yes. It was added on Mar 28, 2022 with a federal remediation due date of Apr 18, 2022.

Is there a public exploit for CVE-2011-2005?

Public exploit code is available.

Is there a fix for CVE-2011-2005?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2011-2005 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Request A Demo

Vulnerability Intelligence

CVE-2011-2005

HighExploitedPublic exploit

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…

Published Oct 11, 2011 · Updated Apr 22, 2026

Key Facts

Patch immediately

CVE-2011-2005 is a high-severity vulnerability (CVSS 7.8 v3.1) affecting Windows Server 2003 (Microsoft), Windows Xp (Microsoft).
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 1, 2016. Public exploit code is available.
EPSS estimates a 32% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

7.8

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

EPSS (30-day exploit likelihood)

32%

Higher than 98.2% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2011-2005 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	Mar 28, 2022	Apr 18, 2022	Not reported
Industry KEV feed	Apr 1, 2016	Apr 18, 2022	Not reported
CIRCL KEV	Mar 28, 2022	Apr 18, 2022	Not reported
ENISA EUVD	Mar 28, 2022	n/a	Not reported

Required action: Apply updates per vendor instructions.

Affected Products

3 affected entries in total

Product	Affected versions	Fixed in
Windows Server 2003Microsoft	See advisory	n/a
Windows XpMicrosoft	See advisory	n/a

Timeline

Publicly disclosed
Oct 11, 2011
Added to Industry KEV feed
Apr 1, 2016
Added to CISA KEV
Mar 28, 2022
Added to CIRCL KEV
Mar 28, 2022
Added to ENISA EUVD
Mar 28, 2022
Last updated
Apr 22, 2026

References

3 more references in the full CVE brief

FAQ

Common Questions.

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."
Affected: Windows Server 2003 (Microsoft); Windows Xp (Microsoft). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 1, 2016.
Yes. It was added on Mar 28, 2022 with a federal remediation due date of Apr 18, 2022.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Is CVE-2011-2005 Running On Your Attack Surface?

Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.