CVE-2026-26127

HIGH EXPLOITED

.NET - DoS

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2026-26127 has been observed exploited in the wild (reported by VulnCheck KEV).

Description

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

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0205
EPSS Percentile 78.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

VulnCheck KEV 2026-04-13
CWE
CWE-125
Status published
Products (19)
microsoft/.net 10.0.0 - 10.0.4
Microsoft/.NET 10.0 10.0.0 - 10.0.4
Microsoft/.NET 9.0 9.0.0 - 9.0.14
microsoft/bcl.memory 9.0.0 - 9.0.14
Microsoft/Microsoft.Bcl.Memory 10.0.0 - 10.0.4
Microsoft/Microsoft.Bcl.Memory 9.0.0 - 9.0.14
nuget/Microsoft.Bcl.Memory 9.0.0 - 9.0.14NuGet
nuget/Microsoft.NetCore.App.Runtime.linux-arm 9.0.0 - 9.0.14NuGet
nuget/Microsoft.NetCore.App.Runtime.linux-arm64 9.0.0 - 9.0.14NuGet
nuget/Microsoft.NetCore.App.Runtime.linux-musl-arm 9.0.0 - 9.0.14NuGet
... and 9 more
Published Mar 10, 2026
Tracked Since Mar 11, 2026