Is CVE-2011-1999 being actively exploited?

CVE-2011-1999 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2011-1999?

CVE-2011-1999 has a CVSS 2.0 base score of 9.3 (HIGH).

CVE-2011-1999

HIGH · CVSS 9.3EPSS 26.7%EU EUVD

Microsoft Internet Explorer 8 does not properly allocate and access memory, which allows remote attackers to execute arbitrary code via vectors involving a "dereferenced memory address," aka "Select Element Remote Code Execution Vulnerability."

Key facts

CVSS score: 9.3 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS score: 26.7% (98th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2011-1993)
Published: October 12, 2011
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-1993 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

microsoft / internet explorer
microsoft / windows 7
microsoft / windows server 2003
microsoft / windows server 2008
microsoft / windows server 2008
microsoft / windows server 2008
microsoft / windows server 2008
microsoft / windows vista
microsoft / windows vista
microsoft / windows xp
microsoft / windows xp

References

http://www.securityfocus.com/bid/49964(Broken Link, Third Party Advisory, VDB Entry)
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-081(Patch, Vendor Advisory)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12697(Tool Signature)

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

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