CVE-2009-1542
The Virtual Machine Monitor (VMM) in Microsoft Virtual PC 2004 SP1, 2007, and 2007 SP1, and Microsoft Virtual Server 2005 R2 SP1, does not enforce CPU privilege-level requirements for all machine instructions, which allows guest OS users to execute arbitrary kernel-mode code and gain privileges within the guest OS via a crafted application, aka "Virtual PC and Virtual Server Privileged Instruction Decoding Vulnerability."
Key facts
- CVSS score
- 9.0 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:L/Au:S/C:C/I:C/A:C- Weakness (CWE)
- CWE-264
- EPSS score
- 8.0% (95th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-1538)
- Published
- July 15, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-1538 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- microsoft / virtual pc
- microsoft / virtual pc
- microsoft / virtual pc
- microsoft / virtual pc
- microsoft / virtual server
- microsoft / virtual server
References
- http://secunia.com/advisories/35808
- http://www.securitytracker.com/id?1022544
- http://www.us-cert.gov/cas/techalerts/TA09-195A.html(US Government Resource)
- http://www.vupen.com/english/advisories/2009/1890
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-033
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6166
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
Query CVEs from your AI assistant
The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.
Add the CVE brain