Microsoft Visual Studio up to Visual Studio 2026 buffer overflow

Summaryinfo

A vulnerability classified as critical has been found in Microsoft Visual Studio. Affected is an unknown function. This manipulation causes buffer overflow. The identification of this vulnerability is CVE-2026-69522. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in Microsoft Visual Studio. It has been declared as critical. Affected by this vulnerability is some unknown processing. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.

It is possible to read the advisory at msrc.microsoft.com. This vulnerability is known as CVE-2026-69522 since 08/03/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/12/2026).

The vulnerability scanner Nessus provides a plugin with the ID 344819 (Microsoft .NET Framework (September 2026)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the databases at Tenable (344819) and CERT Bund (WID-SEC-2026-3242). Be aware that VulDB is the high quality source for vulnerability data.

Affected

• Microsoft .NET Framework
• Microsoft ASP.NET
• Microsoft .NET
• Microsoft Visual Studio 2017
• Ubuntu Linux
• Microsoft Visual Studio Code
• Microsoft Visual Studio 2022
• Microsoft Visual Studio 2026

Productinfo

Type

• Programming Tool Software

Vendor

• Microsoft

Name

• Visual Studio

Version

• .NET 8.0
• .NET 9.0
• .NET 10.0
• .NET 11.0
• .NET Framework 3.5
• .NET Framework 4.6.2
• .NET Framework 4.7
• .NET Framework 4.7.1
• .NET Framework 4.7.2
• .NET Framework 4.8
• .NET Framework 4.8.1
• Visual Studio 2022
• Visual Studio 2026

License

• commercial

Website

• Vendor: https://www.microsoft.com/

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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