CVE-2026-120778: Aspire Elevation of Privilege Vulnerability
CVE-2026-120778 is an elevation of privilege vulnerability in Aspire, rated Important by Microsoft, with a CVSS 3.1 base score of 7.3 (High). An attacker can exploit it by an attacker with local access, with low privileges and only if a user takes an action. Microsoft has not reported exploitation in the wild and rates exploitation as less likely. Microsoft released the fix on 10 November 2026 in the November 2026 Patch Tuesday. It affects 2 products in 1 product family (Other).
Key facts
- CVE ID
- CVE-2026-120778
- Severity
- High CVSS 7.3
- Microsoft severity
- Important
- Impact
- Elevation of Privilege
- Exploited in the wild
- No
- Publicly disclosed
- No
- Exploitation likelihood
- Less Likely
- Weakness
- CWE-379
- CISA KEV
- Not listed
- Released
- Last updated
- Patch Tuesday
- November 2026 Patch Tuesday
- Product families
- Other
CVSS score and vector
Microsoft scores CVE-2026-120778 at 7.3 (temporal 6.4) using CVSS 3.1. Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
| Metric | Value |
|---|---|
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality impact | High |
| Integrity impact | High |
| Availability impact | High |
| Exploit code maturity | Unproven |
| Remediation level | Official fix |
| Report confidence | Confirmed |
Description
Creation of temporary file in directory with insecure permissions in .NET Aspire allows an authorized attacker to elevate privileges locally.
Frequently asked questions (Microsoft)
What privileges could an attacker gain by successfully exploiting this vulnerability?
An attacker could execute code with the permissions of another user on the affected system. This could give the attacker access to data and resources available to that user.
Affected products (2)
Other
| Product | Security update | Type | Fixed build | Restart |
|---|---|---|---|---|
| Aspire.Cli on Linux | Release Notes | Security Update | 13.6.5 | |
| Aspire.Cli on Mac OS | Release Notes | Security Update | 13.6.5 |
NIST NVD data
- NVD status
- Awaiting Analysis
- NVD CVSS
- 7.3 (HIGH)
- NVD weakness
- CWE-379
- Published to NVD
- NVD last modified
References
Acknowledgments
- l8BL with ENKI WhiteHat
Revision history
| Version | Date | Description |
|---|---|---|
| 1.0 | Information published. | |
| 1.1 | Updated the products listed in the Security Updates table. This is an informational change only. |