Is CVE-2011-1966 being actively exploited?

CVE-2011-1966 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2011-1966?

CVE-2011-1966 has a CVSS 2.0 base score of 10.0 (HIGH).

CVE-2011-1966

HIGH · CVSS 10.0EPSS 55.2%EU EUVD

The DNS server in Microsoft Windows Server 2008 SP2, R2, and R2 SP1 does not properly handle NAPTR queries that trigger recursive processing, which allows remote attackers to execute arbitrary code via a crafted query, aka "DNS NAPTR Query Vulnerability."

Key facts

CVSS score: 10.0 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Weakness (CWE): CWE-20
EPSS score: 55.2% (99th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2011-1960)
Published: August 10, 2011
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-1960 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

microsoft / windows server 2008
microsoft / windows server 2008
microsoft / windows server 2008

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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