Heap-based Buffer Overflow in Visual Studio by Microsoft
CVE-2026-69522

8.8HIGH

Key Information:

Vendor

Microsoft
Status
.net 10.0
.net 11.0
.net 8.0
.net 9.0
Vendor
CVE Published:
8 September 2026

What is CVE-2026-69522?

A heap-based buffer overflow vulnerability in Microsoft Visual Studio enables an unauthorized attacker to execute arbitrary code through network interactions. The flaw occurs due to improper handling of data, allowing an attacker to send specially crafted input leading to potential code execution in the context of the application. This vulnerability underscores the importance of updating to secure versions and employing best practices for securing development environments.

Affected Version(s)

.NET 10.0 10.0.0 < 10.0.12

.NET 11.0 11.0.0 < 11.0 RC1

.NET 8.0 8.0.0 < 8.0.31

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.