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CVE-2012-4787

CRITICAL
9
CVSS Score
Published: December 12, 2012 at 12:00 AM UTC
Updated: June 16, 2026 at 11:45 PM UTC
7 products affected across 1 vendorInternet ExplorerWindows Server 2012Windows Server 2008

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Severity
CRITICAL9
Exploit prediction
EPSS 18%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Internet Explorer· Microsoft
95%
109
microsoft-windows-7 (environment) · microsoft-windows-8 (environment) · microsoft-windows-rt (environment) · microsoft-windows-server-2008 (environment) · microsoft-windows-server-2012 (environment) · microsoft-windows-vista (environment)
Windows 7· Microsoftdevice
80%
All versions
Windows 8· Microsoftdevice
80%
All versions
Windows Rt· Microsoftdevice
80%
All versions
Windows Server 2008· Microsoftdevice
80%
All versions
Windows Server 2012· Microsoftdevice
80%
All versions
Windows Vista· Microsoftdevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Third Party Advisoryx_refsource_CERTUS Government Resource
Source: [email protected]
http://www.us-cert.gov/cas/techalerts/TA12-346A.html
Vendor Advisoryx_refsource_MS
Source: [email protected]
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-077
VDB EntrySignaturex_refsource_OVAL
Source: [email protected]
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16211

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9CRITICALCISA-ADP
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-399CWE-416

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