Microsoft Windows Remote Code Execution Vulnerability
Description
Microsoft Windows Kernel contains an unspecified vulnerability in the TrueType font parsing engine in win32k.sys in the kernel-mode drivers that allows remote attackers to execute arbitrary code via crafted font data in a Word document or web page.
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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Details
- Vendor
- Microsoft
- Product
- Windows
- CVE
- CVE-2011-3402
- Affected versions
- Windows XP: SP2, SP3
Windows Vista: SP2
Windows 7: Gold, SP1
Windows Server 2003: SP2
Windows Server 2008: SP2
Windows Server: Gold, SP1 (from the advisory and NVD; check the exact builds in the official advisory) - CVSS score
- 8.8
- Actively exploited
- Yes, listed in the CISA Known Exploited Vulnerabilities catalog
- CISA due date
- October 27, 2025 (deadline for US federal agencies: a good benchmark for you too)
- Source
- CISA KEV – original advisory
- Published
- October 6, 2025
The description and the recommended action are quoted from the public advisory; severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.