11 June 2026
Reference: CVE-2026-47652
1. What is being reported?
Researchers have discovered a problem in Windows Hyper-V, a technology used to run virtual computers. The flaw allows someone with local access to the system to read memory outside allowed areas, which can let them run malicious software on the affected machine.
2. What this means in plain English
If an attacker gains access to your computer, they could use this flaw to take control of it, potentially stealing information or causing damage. This is especially risky if your business uses virtual machines or Windows servers.
3. Could this affect a small business?
Small businesses using Windows with Hyper-V enabled could be affected, especially if they run virtual machines or use Windows servers. Those not using Hyper-V or virtualisation features are less likely to be impacted.
4. What to do now
- Check if your Windows systems have Hyper-V enabled or if you use virtual machines.
- Apply the latest Windows security updates from Microsoft as soon as possible.
- Ensure your staff do not allow unknown people physical or remote access to your computers.
- Ask your IT provider to confirm that all relevant systems are patched and secure.
5. Ask your IT provider
Can you confirm if our Windows systems are affected by the CVE-2026-47652 Hyper-V vulnerability and that all necessary security updates have been applied?
6. Bottom line
Keep your Windows systems updated to protect against this serious Hyper-V security flaw.
Information based on CISA KEV, NVD and reputable security reporting.