Out-of-Bounds Write Vulnerability in .NET Framework by Microsoft
CVE-2026-70354

7.8HIGH

Key Information:

Vendor

Microsoft
Status
.net 10.0
.net 8.0
.net 9.0
Microsoft .net Framework 3.5
Vendor
CVE Published:
11 August 2026

What is CVE-2026-70354?

An out-of-bounds write vulnerability exists in the .NET Framework, which allows an unauthorized attacker to execute arbitrary code on affected systems. This can lead to severe security breaches, enabling attackers to manipulate system processes and gain access to sensitive information. Users are strongly advised to apply recommended patches to mitigate the risks associated with this vulnerability.

Affected Version(s)

.NET 10.0 10.0.0 < 10.0.11

.NET 8.0 8.0.0 < 8.0.30

.NET 9.0 9.0.0 < 9.0.19

References

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

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.