CVE-2026-57089 Windows SMB Server Network Transport Driver (srvnet.sys) Remote Code Execution Vulnerability
An unauthorized attacker can execute code over the network via a use-after-free flaw in the Windows SMB Server Network Transport Driver.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-57089?
CVE-2026-57089 is a high-severity use after free vulnerability in Microsoft Windows 10 1607, published on 14 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Use after free in Windows SMB Server Network Transport Driver (srvnet.sys) allows an unauthorized attacker to execute code over a network.
Weakness: CWE-416
Which versions are affected by CVE-2026-57089?
It affects 12 products.
Products include Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 24h2, Microsoft Windows 11 25h2 and 6 more.
How do I fix CVE-2026-57089?
No fix has been published for CVE-2026-57089 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-2026-57089 being exploited?
There is no known exploitation of CVE-2026-57089 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 10 1607
- CVE-2026-33824 Microsoft Internet Key Exchange (IKE) Service Extensions Double Free
- CVE-2026-21510 Microsoft Windows Shell Protection Mechanism Failure
- CVE-2026-21513 Microsoft MSHTML Framework Protection Mechanism Failure
- CVE-2023-32049 Microsoft Windows Defender SmartScreen Security Feature Bypass
- CVE-2023-29360 Microsoft Streaming Service Untrusted Pointer Dereference
Sources
Also known as GHSA-66gf-59r4-7c5w.