What’s Vulnerable › Vulnerabilities

CVE-2012-2521

• Severity: critical (CVSS 9.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 20.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2012-08-15 · updated 2026-06-16
• Weakness: CWE-94

Description

Microsoft Internet Explorer 6 through 9 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing a deleted object, aka "Asynchronous NULL Object Access Remote Code Execution Vulnerability."

Affected products

• Microsoft Internet Explorer 11: 6, 7, 8, 9

References

• http://www.us-cert.gov/cas/techalerts/TA12-227A.html
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-052
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15742
• http://www.us-cert.gov/cas/techalerts/TA12-227A.html
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-052
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15742

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