CVE-2011-3402

HIGH

8.8

CVSS Score

Published: November 4, 2011 at 09:00 PM UTC

Updated: June 16, 2026 at 11:33 PM UTC

5 products affected across 1 vendorWindows Server 2008Windows 7Windows Xp

Using N/A by N/A?

Get instant alerts when new vulnerabilities affect N/A - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

HIGH8.8

Exploitation

CISA KEV

Exploit prediction

EPSS 78%

SSVC

Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score78.1%

EPSS (Exploit Prediction Scoring System) estimates a 78.1% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

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.

Ransomware Use

Unknown

Added to KEV

Oct 6, 2025

Remediation Due

Oct 27, 2025

365 days overdue

Notes

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-087

https://nvd.nist.gov/vuln/detail/CVE-2011-3402

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."