CVE-2009-1123: Microsoft Windows Improper Input Validation Vulnerability

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: yes — in CISA KEV since 2022-03-03
EPSS: 4.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-06-10 · updated 2026-06-16

Description

The kernel in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 SP2 does not properly validate changes to unspecified kernel objects, which allows local users to gain privileges via a crafted application, aka "Windows Kernel Desktop Vulnerability."

Affected products

Microsoft Windows 2000: all versions
Microsoft Windows Server 2003: all versions
Microsoft Windows Server 2008: all versions
Microsoft Windows Vista: all versions
Microsoft Windows XP Service Pack 3: all versions

References

http://osvdb.org/54940
http://secunia.com/advisories/35372
http://www.securitytracker.com/id?1022359
http://www.us-cert.gov/cas/techalerts/TA09-160A.html
http://www.vupen.com/english/advisories/2009/1544
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-025
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6206
http://osvdb.org/54940
http://secunia.com/advisories/35372
http://www.securitytracker.com/id?1022359
http://www.us-cert.gov/cas/techalerts/TA09-160A.html
http://www.vupen.com/english/advisories/2009/1544

Get alerted when CVE-2009-1123 or the next vulnerability affects your stack