CVE-2025-27491 Windows Hyper-V Remote Code Execution Vulnerability
An authorized attacker can execute code over the network via a use-after-free flaw in Windows Hyper-V.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-27491?
CVE-2025-27491 is a high-severity use after free vulnerability in Microsoft Windows 10 1507, published on 8 Apr 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Use after free in Windows Hyper-V allows an authorized attacker to execute code over a network.
Weakness: CWE-416
Which versions are affected by CVE-2025-27491?
It affects 13 products.
Products include Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 22h2 and 7 more.
How do I fix CVE-2025-27491?
No fix has been published for CVE-2025-27491 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2025-27491 being exploited?
There is no known exploitation of CVE-2025-27491 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 10 1507
- CVE-2017-8543 Microsoft Windows Search Remote Code Execution
- CVE-2025-33053 Microsoft Windows External Control of File Name or Path
- CVE-2025-33073 Microsoft Windows SMB Client Improper Access Control
- CVE-2024-49039 Microsoft Windows Task Scheduler Privilege Escalation
- CVE-2024-43461 Microsoft Windows MSHTML Platform Spoofing
Sources
Also known as GHSA-c8q9-g877-5qr3.