What’s Vulnerable › Vulnerabilities
CVE-2011-1998
- Severity: critical (CVSS 9.3 v2.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 21.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2011-10-12 · updated 2026-06-16
- Weakness: CWE-908
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."
Affected products
References
- http://www.securityfocus.com/bid/49963
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-081
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13199
- http://www.securityfocus.com/bid/49963
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-081
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13199
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