VULNERABILITY INTELLIGENCE

CVE-2011-1998

CVSS score9.3 HIGH

EPSS probability21.23%

CISA KEVNot currently listed

Published2011-10-12

Last modified2026-06-16

CVSS vectorAV:N/AC:M/Au:N/C:C/I:C/A:C

Description

Microsoft Internet Explorer 9 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing an object that was not properly initialized, aka "Jscript9.dll Remote Code Execution Vulnerability."

Weakness classification

CWE-908: Use of Uninitialized Resource

Primary references

secure@microsoft.com — Broken Link, Third Party Advisory, VDB Entry
secure@microsoft.com — Patch, Vendor Advisory
secure@microsoft.com — Tool Signature
af854a3a-2127-422b-91ae-364da2661108 — Broken Link, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108 — Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Tool Signature