{"id":"CVE-2009-1542","aliases":["EUVD-2009-1538","GHSA-7v53-rx9j-jjwf"],"status":"published","title":"The Virtual Machine Monitor (VMM) in Microsoft Virtual PC 2004 SP1, 2007, and 2007 SP1, and...","description":"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.\"","severity":{"version":"2.0","score":9,"vector":"AV:N/AC:L/Au:S/C:C/I:C/A:C","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.07977,"percentile":0.94792,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-264"],"published":"2009-07-15T15:00:00Z","modified":"2026-06-16T23:07:29Z","products":[{"vendor":"microsoft","product":"virtual_pc"},{"vendor":"microsoft","product":"virtual_server"}],"references":[{"url":"http://www.vupen.com/english/advisories/2009/1890","tags":["vdb-entry","x_refsource_VUPEN","x_transferred"]},{"url":"http://secunia.com/advisories/35808","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred"]},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-033","tags":["vendor-advisory","x_refsource_MS","x_transferred"]},{"url":"http://www.securitytracker.com/id?1022544","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"http://www.us-cert.gov/cas/techalerts/TA09-195A.html","tags":["third-party-advisory","x_refsource_CERT","x_transferred","US Government Resource"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6166","tags":["vdb-entry","signature","x_refsource_OVAL","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-1542"},{"url":"https://github.com/advisories/GHSA-7v53-rx9j-jjwf"}],"sources":{"cve":[{"id":"CVE-2009-1542","description":"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.\"","status":"published","published":"2009-07-15T15:00:00Z","modified":"2024-08-07T05:20:33.43Z","updated_at":"2026-11-02T14:33:25.516454Z"}],"euvd":[{"id":"EUVD-2009-1538","description":"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.\"","status":"published","published":"2009-07-15T15:00:00Z","modified":"2024-08-07T05:20:33Z","updated_at":"2026-11-03T01:39:21.330306Z"}],"ghsa":[{"id":"GHSA-7v53-rx9j-jjwf","title":"The Virtual Machine Monitor (VMM) in Microsoft Virtual PC 2004 SP1, 2007, and 2007 SP1, and...","description":"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.\"","status":"published","published":"2022-05-02T03:26:09Z","modified":"2023-01-31T05:07:31Z","updated_at":"2026-11-02T14:49:13.573597Z"}],"nvd":[{"id":"CVE-2009-1542","description":"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.\"","status":"published","published":"2009-07-15T15:30:01.42Z","modified":"2026-06-16T23:07:29.31Z","cvss":[{"version":"2.0","score":9,"vector":"AV:N/AC:L/Au:S/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-264"],"updated_at":"2026-11-02T14:01:36.200173Z"}]}}