CVE-2011-3402 Microsoft Windows Remote Code Execution
Remote attackers can execute arbitrary code via crafted TrueType font data in documents or web pages, affecting Windows kernel drivers.
- Exploited in the wild
- Since 6 Oct 2025
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2011-3402?
CVE-2011-3402 is a high-severity memory corruption vulnerability in Microsoft Windows 7, published on 4 Nov 2011. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Unspecified vulnerability in the TrueType font parsing engine in win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote attackers to execute arbitrary code via crafted font data in a Word document or web page, as exploited in the wild in November 2011 by Duqu, aka "TrueType Font Parsing Vulnerability."
Which versions are affected by CVE-2011-3402?
It affects 5 products.
Products include Microsoft Windows 7, Microsoft Windows Server 2003, Microsoft Windows Server 2008, Microsoft Windows Vista, Microsoft Windows Xp.
How do I fix CVE-2011-3402?
No fix has been published for CVE-2011-3402 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 27 Oct 2025.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2011-3402 being exploited?
Yes. Attackers have exploited CVE-2011-3402 in the wild since at least 6 Oct 2025.
Public exploit code: 1 Metasploit module.
Other vulnerabilities in Microsoft Windows 7
- CVE-2015-1635 Microsoft HTTP.sys Remote Code Execution
- CVE-2015-2360 Microsoft Win32k Privilege Escalation
- CVE-2014-6324 Microsoft Kerberos Key Distribution Center (KDC) Privilege Escalation
- CVE-2014-6332 Microsoft Windows Object Linking & Embedding (OLE) Automation Array Remote Code Execution
- CVE-2014-4148 Microsoft Windows Remote Code Execution
Sources
Also known as GHSA-qv6f-65c9-qp9p.