CVE-2011-3402
Exploited in the wild. In CISA KEV since 2025‑10‑06. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
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."
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Listed as exploited in the wild since 2025-10-06.
US federal agencies must remediate by 2025-10-27.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
78% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
7 events over 5347 days, from the signal feeds we watch.
- OpenVAS check added
- Patch availablerecord updated
- EPSS band changecritical → high
- Added to CISA KEV
- Publishedweakness classified
Affected products
- Windows Server 2003 Service Pack 2Operating Systems / windows
- Windows 7 Service Pack 1Operating Systems / windows
- Windows Server 2008 Service Pack 2Operating Systems / windows
- Windows Vista Service Pack 2Operating Systems / windows
- Windows XP Service Pack 3Operating Systems / windows
- Windows Server 2008 R2 Service Pack 1Operating Systems / windows
- Windows XP Professional Edition Service Pack 2Operating Systems / windows
- windows vistaOperating Systems / windows
And 7 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Scored 8.8 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction RequiredA user must click a link, open a file, or perform some action
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
Sources
References in the record
- secunia.com/advisories/49121
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15645
- us-cert.gov/cas/techalerts/TA12-164A.html
And 19 more references. See all after sign-in
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