How severe is CVE-2011-2005?

CVE-2011-2005 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2011-2005 being actively exploited?

Yes. CVE-2011-2005 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-28, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2011-2005?

CVE-2011-2005 primarily affects Microsoft Windows Server 2003. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-2005?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2011-2005 have an EU (EUVD) identifier?

Yes. CVE-2011-2005 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2011-1999. It is also flagged as exploited in the EUVD (since 2022-03-28).

When was CVE-2011-2005 published?

CVE-2011-2005 was published on 2011-10-12 and last updated on 2026-06-16.

CVE-2011-2005

CVE-2011-2005 is a high-severity vulnerability in Microsoft Windows Server 2003 with a CVSS 3.x base score of 7.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-03-28).

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 32% (98th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-03-28)
EU (EUVD) id: EUVD-2011-1999
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-03-28)
Affected product: Microsoft Windows Server 2003
Published: 2011-10-12
Last modified: 2026-06-16

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."

Frequently asked questions

What is CVE-2011-2005?: 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."
How severe is CVE-2011-2005?: CVE-2011-2005 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2011-2005 being actively exploited?: Yes. CVE-2011-2005 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-28, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2011-2005?: CVE-2011-2005 primarily affects Microsoft Windows Server 2003. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-2005?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2011-2005 have an EU (EUVD) identifier?: Yes. CVE-2011-2005 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2011-1999. It is also flagged as exploited in the EUVD (since 2022-03-28).
When was CVE-2011-2005 published?: CVE-2011-2005 was published on 2011-10-12 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:o:microsoft:windows_server_2003:-:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:-:sp2:*:*:professional:*:x64:*
cpe:2.3:o:microsoft:windows_xp:-:sp3:*:*:*:*:*:*

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