What is CVE-2026-120778?

CVE-2026-120778 is a high-severity vulnerability in Microsoft Aspire.cli, classified under Creation of Temporary File in Directory with Insecure Permissions. CVSS score: 7.3/10. Published 2026-11-10.

How severe is CVE-2026-120778?

High severity. CVSS v3 base score is 7.3 out of 10.

Vulnerability in Microsoft Aspire.cli

CVE-2026-120778

Creation of temporary file in directory with insecure permissions in .NET Aspire allows an authorized attacker to elevate privileges locally.

Published 2026-11-10 · last modified 2026-11-10.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Microsoft Aspire.cli

Weakness classification (CWE)

CWE-379 — Creation of Temporary File in Directory with Insecure Permissions

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-120778 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-120778?: CVE-2026-120778 is a high-severity vulnerability in Microsoft Aspire.cli, classified under Creation of Temporary File in Directory with Insecure Permissions. CVSS score: 7.3/10. Published 2026-11-10.
How severe is CVE-2026-120778?: High severity. CVSS v3 base score is 7.3 out of 10.