CVE-2026-26127

.NET Denial of Service Vulnerability

State: Published
Severity: 7.5 High
Published: Mar 10, 2026
Updated: Jun 19, 2026
Reserved: Feb 11, 2026

Description

Out-of-bounds read in .NET allows an unauthorized attacker to deny service over a network.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
.NET 10.0Microsoft	10.0.0 to before 10.0.4Affected
.NET 9.0Microsoft	9.0.0 to before 9.0.14Affected
Microsoft.Bcl.MemoryMicrosoft	10.0.0 to before 10.0.4Affected
Microsoft.Bcl.MemoryMicrosoft	9.0.0 to before 9.0.14Affected

References

.NET Denial of Service Vulnerabilityvendor-advisorypatch

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