What is CVE-2026-26131?

CVE-2026-26131 is a high-severity vulnerability in Microsoft .Net 10.0, classified under Incorrect Default Permissions. CVSS score: 7.8/10. Published 2026-03-10.

How severe is CVE-2026-26131?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Microsoft .Net 10.0

CVE-2026-26131

Incorrect default permissions in .NET allows an authorized attacker to elevate privileges locally.

EPSS: 0.000 (7.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C.

Affected products

Microsoft .Net 10.0 — versions 10.0.0

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

References

.NET Elevation of Privilege Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-26131?: CVE-2026-26131 is a high-severity vulnerability in Microsoft .Net 10.0, classified under Incorrect Default Permissions. CVSS score: 7.8/10. Published 2026-03-10.
How severe is CVE-2026-26131?: High severity. CVSS v3 base score is 7.8 out of 10.