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CVE-2012-4787

CRITICAL · CVSS 9.0EPSS 17.6%EU EUVD

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."

Key facts

CVSS score
9.0 (v3.1)
Severity
CRITICAL
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE)
CWE-399
EPSS score
17.6% (97th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2012-4712)
Published
December 12, 2012
NVD last modified
June 16, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2012-4712 in the EU Vulnerability Database. Last updated in EUVD on October 17, 2024.

View on the EU Vulnerability Database

Affected products

  • microsoft / internet explorer
  • microsoft / internet explorer
  • microsoft / windows 7
  • microsoft / windows 7
  • microsoft / windows 7
  • microsoft / windows 7
  • microsoft / windows 8
  • microsoft / windows 8
  • microsoft / windows rt
  • microsoft / windows server 2008
  • microsoft / windows server 2008
  • microsoft / windows server 2008
  • microsoft / windows server 2012
  • microsoft / windows vista

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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