Is CVE-2011-3402 actively exploited?

Yes. CVE-2011-3402 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2011-3402 be exploited remotely?

The attack vector of CVE-2011-3402 has not been classified yet.

What is the CVSS score of CVE-2011-3402?

CVE-2011-3402 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2011-3402

HIGHCISA KEVIN THE WILD

CVE-2011-3402

Published: October 6, 2025

EPSS:89.22%probability of exploitation in 30 daysPercentile:99.5th

Official 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.

NVD Source

CISA KEV Advisory

Microsoft Windows Remote Code Execution Vulnerability

Added to KEV: 2025-10-06Federal patch deadline: 2025-10-27

Required Action (CISA)

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Risk Analysis

This vulnerability in the Microsoft Windows Kernel's TrueType font parsing engine (win32k.sys) allows remote attackers to execute arbitrary code. This is a critical flaw given its high EPSS score of 0.89217, indicating a very high likelihood of exploitation, and its presence in CISA's KEV catalog confirms it has been actively exploited.

This vulnerability has been actively exploited in the wild. Attackers can deliver crafted font data via Word documents or web pages to achieve remote code execution.

Recommended Action

Apply all available security updates for Microsoft Windows to address this kernel vulnerability. Exercise caution when opening untrusted documents or visiting unknown websites.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2011-3402 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2011-3402 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.