SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityAnalyzed

CVE-2026-26127

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

HIGH 7.5EPSS 2.05%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (2.05%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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

CVSS 3.1
7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
2.05% probability · 80th percentile
CISA KEV
Not listed
Weakness
CWE-125
Affected
microsoft/.net · microsoft/bcl.memory
Source
secure@microsoft.com

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.