What’s Vulnerable › Vulnerabilities

CVE-2012-4787

• Severity: critical (CVSS 9.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 17.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2012-12-12 · updated 2026-06-16
• Weakness: CWE-399

Description

Use-after-free vulnerability in Microsoft Internet Explorer 9 and 10 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to an object that (1) was not properly initialized or (2) is deleted, aka "Improper Ref Counting Use After Free Vulnerability."

Affected products

• Microsoft Internet Explorer 11: 9, 10

References

• http://www.us-cert.gov/cas/techalerts/TA12-346A.html
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-077
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16211
• http://www.us-cert.gov/cas/techalerts/TA12-346A.html
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-077
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16211

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