CVE-2009-1542

What it is

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."

At a glance

Exploitability

Can be exploited over the network with a login. High risk of data exposure, data tampering, service disruption.

Exploit odds

8.0% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2009-05-05 00:00 UTC ReservedThe CVE id was reserved by its CNA
2. 2009-07-15 15:30 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2026-06-16 23:07 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 8.0% in the next 30 days (EPSS).
• Severity: 9.0 HIGH (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2009-07-15 15:30 UTC

Last modified

2026-06-16 23:07 UTC

Exploit probability

8.0% · EPSS, next 30 days

Weakness

CWE-264

Record status

Modified

Affected

• Microsoft Virtual Pc 2004
• Microsoft Virtual Pc 2007
• Microsoft Virtual Server 2005

Attack profile CVSS 2.0 · 9.0

Attack vector

Network

Complexity

Low

Authentication

Single

Confidentiality

Complete

Integrity

Complete

Availability

Complete

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2009-1542.md and follow it. Check whether this project is affected by CVE-2009-1542. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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