Microsoft Windows Remote Code Execution Vulnerability
Microsoft — Windows
- Added to KEV catalog
- 6 October 2025
- Federal remediation due date
- 27 October 2025
CISA 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.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-087 ; https://nvd.nist.gov/vuln/detail/CVE-2011-3402
More Microsoft Vulnerabilities
Microsoft SharePoint Code Injection Vulnerability
Microsoft Windows Link Following Vulnerability
Microsoft Windows Heap-Based Buffer Overflow Vulnerability
Microsoft SQL Server Remote Code Execution Vulnerability
Microsoft Internet Key Exchange (IKE) Service Extensions Double Free Vulnerability
Is this vulnerability present in your environment?
CRS delivers independent VAPT assessments that identify exactly which known-exploited vulnerabilities exist in your network, applications, and infrastructure.
Explore VAPT Services