CVE-2011-1999

Exp

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."

Published: 2011-10-12 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-1999 is rated High Exploit Risk (81.4/100): CVSS Critical severity, with high exploitation likelihood (EPSS 27.96%, 98th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2011-1999

EDB-ID Source Kind Published Link
36209 exploit_db edb 2011-10-11 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2011-1999

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 42.45% 27.96% -14.49%
2 2026-01-29 51.11% 42.45% -8.66%
3 2025-12-28 — 51.11% —

Full EPSS history (23 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1999

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2011-1999

Affected software / configurations for CVE-2011-1999

Vendor Product Version Raw CPE
microsoft internet_explorer 8 cpe:2.3:a:microsoft:internet_explorer:8:*:*:*:*:*:*:*

References for CVE-2011-1999

cvelogic Threat Intelligence