Type Vulnerability
Updated the products listed in the Security Updates table.
Microsoft
Creation of temporary file in directory with insecure permissions in .NET Aspire allows an authorized attacker to elevate privileges locally
CVE-2026-120778
What this means
This is rated high severity (7.3 out of 10). There is no confirmed exploitation of it yet. Ask IT whether the affected products are in your estate.
Full vendor description
Creation of temporary file in directory with insecure permissions in .NET Aspire allows an authorized attacker to elevate privileges locally.
Scoring and exploitation
7.3/ 10
CVSS 3.1 base scoreHigh
Exploitable only with local access and a low-privilege account, but only if a user takes an action, such as opening a file or link. High impact on confidentiality, integrity and availability.
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Exploitability
Longer bar: easier to attack
Attack vectorLocalAV:L
Attack complexityLowAC:L
Privileges requiredLowPR:L
User interactionRequiredUI:R
ScopeUnchangedS:U
Impact
Longer bar: more harm
ConfidentialityHighC:H
IntegrityHighI:H
AvailabilityHighA:H
- Not reported
- Exploited in the wild
- Not confirmed in the
- Not reported
Weaknesses
CWE-379
References
1 link from the CVE record, grouped by site.
msrc.microsoft.com1 link