CVE-2011-3402: Microsoft Windows Remote Code Execution Vulnerability
Vulnerability summary
CVE-2011-3402 is a high (CVSS 9.3) vulnerability in Microsoft Windows. It is known to be exploited: CISA lists it, first on 06-10-2025. EPSS estimates a 78.14% chance of exploitation in the next 30 days, higher than 99.5% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 04-11-2011PublishedVulnerability first disclosed.
- 06-10-2025Added to CISA KEVMicrosoft Windows Remote Code Execution Vulnerability
- 22-10-2025Last modifiedVulnerability information updated.
- 27-10-2025CISA remediation dueApply mitigations per vendor instructions.
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."
CVSS metrics
3 scores · 2 sources · 2 versions- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
78.14%
Chance of exploitation in the next 30 days
Percentile
100%
Versus all other CVEs
30-day change
0.00 pp
From 78.14% on 19-09-2026
Known exploited
Compare KEV catalogs
CISA KEVListed- Added
- 06-10-2025
- Federal due date
- 27-10-2025
CISA 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. docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-087 nvd.nist.gov/vuln/detail/CVE-2011-3402
Public exploits
1 foundWindows Gather Forensics Duqu Registry Check
post/windows/gather/forensics/duqu_check
Maturity: poc
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Microsoft5 products
1 vendor · 5 products
References
21 links- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15645VDB EntrySignatureX Refsource OVALBroken Link
- www.us-cert.gov/cas/techalerts/TA12-164A.htmlThird Party AdvisoryX Refsource CERTUS Government Resource
docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-087Vendor AdvisoryX Refsource MS- www.us-cert.gov/cas/techalerts/TA11-347A.htmlThird Party AdvisoryX Refsource CERTUS Government Resource
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13998VDB EntrySignatureX Refsource OVALBroken Link
Show all 21 references
- docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-034Vendor AdvisoryX Refsource MS
- docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-039Vendor AdvisoryX Refsource MS
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15290VDB EntrySignatureX Refsource OVALBroken Link
- www.symantec.com/connect/w32-duqu_status-updates_installer-zero-day-exploitX Refsource MISCNot Applicable
- www.us-cert.gov/cas/techalerts/TA12-129A.htmlThird Party AdvisoryX Refsource CERTUS Government Resource
- blogs.technet.com/b/msrc/archive/2011/11/03/microsoft-releases-security-advisory-2639658.aspxX Refsource CONFIRMVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2011-3402Government ResourceUS Government Resource