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Vulnerability record · CVE-2011-2003 · published 12 October 2011

CVE-2011-2003: Microsoft windows 2003 server memory buffer overflow vulnerability

Microsoft · Windows 2003 Server

Buffer overflow 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 a crafted .fon file, aka "Font Library File Buffer Overrun Vulnerability."

9.3 CVSS 2.0 High EPSS 27% · top 2.1% CWE-119 · Memory buffer overflow
9.3CVSS 2.0 base score
27%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
8References
16 Jun 2026Last modified by NVD

Description

Buffer overflow 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 a crafted .fon file, aka "Font Library File Buffer Overrun Vulnerability."

AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://securityreason.com/securityalert/8473
http://www.securitytracker.com/id?1026165
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-077
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13103
http://securityreason.com/securityalert/8473
http://www.securitytracker.com/id?1026165
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-077
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13103

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2011-2003), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.