CVE-2026-69522 .NET and Visual Studio Remote Code Execution Vulnerability
Heap-based buffer overflow in Visual Studio allows remote attackers to execute arbitrary code over the network.
- 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
- Available
What is CVE-2026-69522?
CVE-2026-69522 is a high-severity memory corruption vulnerability in Microsoft .NET 10.0, published on 8 Sep 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
Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.
Weakness: CWE-122
Which versions are affected by CVE-2026-69522?
2 open source packages ship an affected version, including Microsoft.DiaSymReader.Native.
| Package | Affected | Fixed in |
|---|---|---|
Microsoft.DiaSymReader.Native NuGet | From 17.10.0-beta1.24272.1 | 18.9.0-beta1.26405.2 |
Microsoft.DiaSymReader.Native NuGet | From 17.10.0-beta1.24272.1 | 18.9.0-beta1.26405.2 |
How do I fix CVE-2026-69522?
Upgrade Microsoft.DiaSymReader.Native to 18.9.0-beta1.26405.2 or later.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-69522 being exploited?
There is no known exploitation of CVE-2026-69522 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-69522, GHSA-2j8r-3c22-8565, UBUNTU-CVE-2026-69522.